Book excerpt: The Blood Group Antigen FactsBook has been an essential resource in the hematology, transfusion and immunogenetics fields since its first publication in the late 1990s.The third edition of The Blood Group Antigen FactsBook has been completely revised, updated and expanded to cover all 32 blood group systems. It blends scientific background and clinical applications and provides busy researchers and clinicians with at-a-glance information on over 330 blood group antigens, including history and information on terminology, expression, chromosomal assignment, carrier molecular description, functions, molecular bases of antigens and phenotypes, effect of enzymes/chemicals, clinical significance, disease associations and key references. Includes over 330 entries on blood group antigens in individual factsheetsOffers a logical and concise catalogue structure for each antigen in an improved interior design for quick reference. Written by 3 international experts from the field of immunohematology and transfusion medicine.