The third edition of this book is a valuable addition. Not surprisingly, given that it comprises 456 pages, it is comprehensive. It is clearly written, well illustrated and supported by extensive references. The principles are thoroughly explained and there are 13 chapters dealing with individual diseases or groups of diseases. Flow cytometric immunophenotyping results are correlated with morphological characteristics and molecular/cytogenetic abnormalities. Limitations of the procedure are discussed. The text is up-to-date, incorporating the 2016 revision of the WHO classification of tumours of haemopoietic and lymphoid tumours. Since there is a great deal of detailed information, it will serve as a useful reference for immunophenotyping laboratories as well as being an educational tool for others. Barbara J. Bain, St Marys Hospital Campus of Imperial College London, Department of Haematology, British Journal of Haematology