What is Blood Cells: A Practical Guide, 7th Edition?
Blood Cells: A Practical Guide, 7th Edition is a practical diagnostic haematology reference by Barbara J. Bain and Mike Leach. Published in 2026, it covers blood sampling, blood counts, blood-cell morphology, laboratory errors, supplementary tests, and disorders of red cells, platelets, and white cells. It is designed for practising and trainee haematologists and laboratory professionals.
Introduction
What Is Blood Cells: A Practical Guide, 7th Edition?
Blood Cells: A Practical Guide, Seventh Edition is a comprehensive practical reference in diagnostic haematology by Barbara J. Bain and Mike Leach. The seventh edition was first published in 2026 by John Wiley & Sons Ltd.
The book continues a series that began with its first edition in 1989 and has been developed around the practical interpretation of blood specimens, blood counts, and blood-cell morphology.
The book is particularly focused on the laboratory side of haematology. Rather than treating blood counts as isolated numerical results, it emphasizes the relationship between specimen quality, automated blood counts, microscopy, cell morphology, and clinical interpretation.
According to the authors' preface, the book was written with both practising haematologists and trainees in mind. Its stated purpose is to provide a useful reference for practising haematologists while also serving as a practical bench manual for trainee haematologists and biomedical scientists.
It also aims to help medically trained haematologists understand the scientific basis of laboratory haematology and help laboratory scientists appreciate the clinical relevance of laboratory investigations.
This makes the book particularly relevant to medical students, interns, residents, young doctors, haematology trainees, biomedical scientists, and other healthcare professionals who need to understand how blood-count results and blood films are produced and interpreted.
A central theme of the seventh edition is the continuing importance of microscopy and the automated full blood count. The authors describe these as the core of the book, while the expanded edition provides additional guidance about further investigations appropriate for a provisional diagnosis.
Book Overview
Full title
Blood Cells: A Practical Guide, 7th Edition
Authors
Barbara J. Bain, MBBS, FRACP, FRCPath
Professor Emerita of Diagnostic Haematology, Imperial College London Faculty of Medicine, and Honorary Consultant Haematologist at St Mary’s Hospital, London.
Mike Leach, MBChB, FRCP, FRCPath
Consultant Haematologist and Honorary Senior Lecturer at the Haematology Laboratories and West of Scotland Cancer Centre, Gartnavel General Hospital, Glasgow.
Publisher
John Wiley & Sons Ltd / Wiley
Edition
Seventh Edition
Publication year
2026
The book states that the seventh edition was first published in 2026. The edition history records previous editions dating from 1989, with the sixth edition published in 2022.
Medical specialty
Haematology, with a strong emphasis on diagnostic and laboratory haematology
Intended audience
The authors specifically identify practising haematologists, trainee haematologists, and biomedical scientists as important readers. The breadth of the contents also makes the book relevant to learners and healthcare professionals who need a structured understanding of blood counts, morphology, and blood-cell disorders.
What This Book Covers
Blood Cells: A Practical Guide, Seventh Edition follows a logical progression from specimen collection and laboratory methodology to morphology, interpretation, supplementary investigations, and disease-associated changes.
1. Blood Sampling and Blood Film Preparation
The opening chapter deals with the practical foundations required before a blood count or blood film can be interpreted accurately.
Topics include obtaining appropriate blood specimens, venepuncture, capillary blood collection, anticoagulants, specimen containers, specimen mixing, blood-film preparation, and examination techniques.
This practical emphasis is important because the quality of the laboratory result depends partly on appropriate specimen collection and handling. The book discusses issues such as patient identification, specimen labelling, anticoagulant selection, sample transport, and the preparation of blood films.
The chapter also addresses blood-film spreading and the importance of producing a satisfactory film for microscopic assessment.
2. Performing a Blood Count
The second chapter focuses on blood-count methodology.
The contents move from traditional manual counting methods toward automated blood-counting systems. This includes consideration of red cells, white cells, platelets, haemoglobin, haematocrit-related measurements, and reticulocyte counting.
The discussion illustrates how modern automated laboratory systems have transformed routine blood-cell counting while also emphasizing circumstances in which microscopy or manual assessment remains important.
For learners, this provides useful background to understanding what the numbers reported on a full blood count actually represent.
3. Morphology of Blood Cells
Blood-cell morphology is one of the central subjects of the book.
The third chapter is devoted to examination of the blood film and systematic assessment of blood cells. The book emphasizes that morphology should be interpreted systematically and in relation to patient information and the accompanying full blood count.
The seventh edition also includes clinical photographs, reflecting the authors' stated intention to reinforce the importance of interpreting blood counts and morphology within a clinical context.
The photomicrographs are presented using predominantly May–Grünwald–Giemsa or similar Romanowsky staining, with the book providing a note about the usual photographic magnification.
4. Detecting Erroneous Blood Counts
Laboratory results are not automatically correct simply because they were generated by an analyser.
Chapter 4 addresses the detection of erroneous blood counts. This is an important practical component because artefacts, specimen problems, abnormal cells, and unusual sample characteristics can affect automated results.
Understanding possible sources of error helps the reader connect the numerical result with the appearance of the blood film and the overall laboratory context.
5. Normal Ranges
The book then addresses normal ranges, providing the framework needed to distinguish expected variation from potentially significant abnormalities.
This is particularly relevant for students and trainees because interpretation of a laboratory result requires more than memorizing individual numerical values. Age, sex, laboratory methodology, and clinical circumstances can all influence how results are understood.
6. Quantitative Changes in Blood Cells
Chapter 6 focuses on quantitative abnormalities involving blood cells.
This section provides a bridge between laboratory measurements and clinical interpretation, addressing changes in blood-cell numbers and helping organize abnormalities according to the affected cell line.
For learners, this creates a useful transition from normal laboratory findings toward the investigation of anaemia, leukocyte abnormalities, thrombocytopenia, thrombocytosis, and related patterns.
7. Important Supplementary Tests
The seventh chapter expands beyond the basic full blood count and blood-film examination.
The authors specifically state in the preface that the seventh edition provides more guidance on further tests that should be performed for a given provisional diagnosis.
This is an important feature for clinical reasoning because an abnormal blood count or blood film frequently represents the starting point of an investigation rather than its conclusion.
8. Disorders of Red Cells and Platelets
Chapter 8 examines disorders affecting red cells and platelets.
The contents extend into a broad range of red-cell abnormalities and platelet disorders, including disorders recognizable through quantitative changes, morphology, and supplementary laboratory investigation.
The book's approach connects laboratory findings with disease patterns, making this section particularly relevant when learning how abnormal morphology can contribute to a differential diagnosis.
9. Disorders of White Cells
The final major chapter addresses disorders of white cells.
The chapter includes reactive white-cell changes as well as haematological neoplasms. The book examines blood-count and blood-film findings in a range of conditions and relates these findings to further diagnostic investigations.
The contents therefore extend from routine reactive abnormalities to more complex haematological disorders.
The complete contents list the nine major chapters, followed by the index.
Key Features
- Seven-edition development: The book is part of a long-established series first published in 1989.
- Practical laboratory orientation: The authors explicitly position it as both a reference work and a practical bench manual.
- Strong emphasis on microscopy: Microscopy and the automated full blood count remain central to the book.
- Blood-film morphology: Systematic examination of blood-cell morphology is a major component.
- Clinical context: Clinical photographs have been incorporated to emphasize the relationship between laboratory findings and clinical interpretation.
- Automated and manual methods: The book discusses both traditional laboratory approaches and automated blood-counting technologies.
- Laboratory error recognition: A dedicated chapter addresses erroneous blood counts.
- Supplementary investigations: The seventh edition adds guidance on further tests relevant to provisional diagnoses.
- Broad disease coverage: Red-cell, platelet, and white-cell disorders receive dedicated coverage.
- Companion educational resources: The companion website provides multiple-choice questions and extended matching questions.
- Updated seventh edition: The authors describe the edition as expanded and updated, with new images and numerous new references.
Who Should Read This Book?
Medical Students
Medical students studying haematology can use the book to develop a structured understanding of blood-cell morphology and the laboratory basis of the full blood count.
It can be particularly useful when moving from theoretical knowledge of red cells, white cells, and platelets toward recognition of their appearance and abnormalities in blood films.
Interns and Junior Doctors
For early-career doctors, the book provides a laboratory-focused framework for understanding abnormal blood counts and recognizing when blood-film morphology and additional investigations become important.
Residents and Haematology Trainees
Trainees are among the explicit audiences identified by the authors. The combination of laboratory methodology, morphology, quantitative abnormalities, supplementary tests, and disease-associated findings makes the book relevant to structured haematology training.
Specialists
Practising haematologists may use the book as a reference for laboratory haematology and blood-cell morphology. The authors state that they aimed for the book to be sufficiently comprehensive to function as a reference for practising haematologists.
Exam Candidates
The companion website includes multiple-choice questions and extended matching questions, providing an additional opportunity for knowledge testing.
Why This Book Is Useful
Clinical Relevance
One of the defining strengths of the book is its effort to connect laboratory findings with clinical interpretation.
The authors specifically state that clinical photographs were introduced to emphasize the importance of interpreting blood counts and morphology in a clinical context.
This approach can help readers avoid viewing the complete blood count as a collection of isolated numerical abnormalities.
Evidence and References
The seventh edition is described by the authors as having been expanded and updated, including new images and numerous new references.
The book therefore provides a referenced academic framework rather than presenting blood-cell morphology as a collection of unsupported observations.
Practical Application
The practical orientation is evident from the chapter sequence. Readers progress from obtaining and preparing a specimen through blood counting, morphology, detection of errors, interpretation of quantitative changes, supplementary tests, and specific disorders.
This structure mirrors the laboratory diagnostic process and can make the material easier to apply in practice.
Board and Examination Preparation
The book's companion website provides MCQs and extended matching questions.
These resources may be useful for examination preparation, particularly for readers who want to test their understanding after studying the relevant chapters.
The book itself is primarily a diagnostic haematology reference and practical guide, so examination preparation should be supplemented with whatever additional resources are required by a particular training program or examination.
Learning Efficiency
The organization into nine major chapters allows readers to approach the material according to their needs.
A learner can begin with specimen collection and blood-film preparation, concentrate on morphology, review quantitative changes, or move directly to particular categories of blood-cell disorders.
Table of Contents Overview
The seventh edition contains the following principal chapters:
|
Chapter |
Main area |
|
1 |
Blood sampling and blood-film
examination |
|
2 |
Performing a blood count |
|
3 |
Morphology of blood cells |
|
4 |
Detecting erroneous blood counts |
|
5 |
Normal ranges |
|
6 |
Quantitative changes in blood cells |
|
7 |
Important supplementary tests |
|
8 |
Disorders of red cells and platelets |
|
9 |
Disorders of white cells |
Strengths of the Book
A Practical Laboratory Perspective
The most distinctive strength is the book's sustained attention to practical diagnostic haematology. The authors do not limit the discussion to disease descriptions; they begin with the specimen and laboratory process.
Strong Emphasis on Morphology
Blood-film examination remains a central theme. This is especially valuable in an era in which automated analysers provide increasingly sophisticated numerical and cellular information.
Integration of Laboratory and Clinical Thinking
The inclusion of clinical photographs reflects the authors' intention to connect laboratory observations with clinical circumstances.
Broad Coverage
The progression from basic laboratory technique through cell morphology and quantitative abnormalities to red-cell, platelet, and white-cell disorders gives the book substantial breadth within its diagnostic haematology focus.
Updated Seventh Edition
The authors describe the seventh edition as expanded and updated, with new images and many new references.
Supplementary Learning Resources
The companion website adds MCQs and extended matching questions, allowing readers to reinforce their knowledge.
Limitations
The principal limitation identifiable from the book's stated scope is also part of its purpose: it is strongly centered on diagnostic and laboratory haematology.
Readers looking specifically for an extensive standalone treatment guide covering all aspects of haematological therapeutics, oncology management, transfusion medicine, or comprehensive clinical management may need additional specialist resources.
This is not presented as a deficiency in the book; rather, it reflects its deliberately practical focus on blood specimens, blood counts, microscopy, morphology, laboratory investigation, and blood-cell disorders.
The available material also does not provide independent user ratings, review scores, or comparative outcome data. Therefore, no numerical rating or reader-review assessment is assigned here.
Comparison With Similar Books
It lists Leukaemia Diagnosis, 6th edition by Bain and Leach (2024) among its further-reading references. The seventh edition of Blood Cells has a broader stated scope, extending beyond leukaemia to specimen collection, blood counts, morphology, quantitative changes, supplementary tests, and disorders of red cells, platelets, and white cells.
The two titles therefore occupy different scopes within haematology, based on the titles and contents identified in the book. A more detailed comparison of chapter-by-chapter depth, illustrations, examination content, and clinical management would require the full texts of the other books and is not established here.
FAQs
Blood Cells: A Practical Guide, 7th Edition is a diagnostic haematology reference by Barbara J. Bain and Mike Leach. It covers blood sampling, blood counts, blood-cell morphology, laboratory errors, normal ranges, quantitative changes, supplementary tests, and disorders of red cells, platelets, and white cells.
The authors state that the book is intended for practising haematologists and trainees, with biomedical scientists also identified as an important audience. Its content may additionally be useful to medical students, residents, and healthcare professionals studying diagnostic haematology.
The seventh edition was first published in 2026 by John Wiley & Sons Ltd. The book records previous editions dating back to 1989.
The principal topics include blood sampling and blood-film preparation, blood-count performance, blood-cell morphology, detection of erroneous blood counts, normal ranges, quantitative blood-cell changes, supplementary tests, disorders of red cells and platelets, and disorders of white cells.
Yes. The authors state that clinical photographs were incorporated to emphasize the importance of interpreting blood counts and morphology in a clinical context.
The companion website provides multiple-choice questions and extended matching questions.
Yes. Blood-cell morphology is one of the central themes of the book. The authors explicitly state that microscopy and the automated full blood count remain its core.
The book is primarily focused on diagnostic and laboratory haematology. Its contents emphasize specimen collection, blood counts, microscopy, morphology, laboratory abnormalities, supplementary testing, and disorders of blood cells.
Conclusion
Blood Cells: A Practical Guide, 7th Edition provides a focused and comprehensive approach to diagnostic haematology, particularly the practical interpretation of blood counts and blood-cell morphology.
Its structure takes the reader from specimen collection and blood-film preparation through blood-count methodology, morphology, laboratory errors, normal ranges, quantitative abnormalities, supplementary investigations, and disorders involving red cells, platelets, and white cells.
The seventh edition was published in 2026 and expands the established series with new images, numerous new references, clinical photographs, and additional guidance on further investigations. The authors continue to emphasize microscopy and the automated full blood count as central components of haematological practice.
For students and trainees, the book offers a structured way to develop laboratory haematology knowledge. For practising haematologists and biomedical scientists, it is positioned as both a reference and a practical laboratory guide. The companion website, with MCQs and extended matching questions, adds an examination and self-assessment component.
For readers interested in understanding not only what a blood count reports but also how laboratory findings and blood-film morphology contribute to diagnostic interpretation, Blood Cells: A Practical Guide, Seventh Edition offers a substantial educational resource within its stated diagnostic haematology scope.
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