This series of 13 reviews of aspects of hematology is especially valuable for its extensive bibliography. Each contributor uses this material to uphold his side in controversial matters. The illustrations in the article entitled Contributions of Dynamic Cytology to Hematology are graphic and illuminating. Among the subjects covered are cytology, radiation injury and bone marrow transplantation, the sickling phenomenon, humoral factors in erythropoiesis, kernicterus, ABO incompatibility and hemolytic anemia in the newborn infant, blood preservation for transfusion, transmission of leukemia, hematological aspects of serotonin, busulfan in the treatment of leukemia, platelet transfusions, hematological complications of esophageal varices, and lipoid anticoagulants. The index is very useful. The book should be valuable to anyone studying the subjects covered, for the analyses of the material as well as for the bibliography.