Genetic Data Analysis II by Bruce S. Weir is a timely revision of his 1990 text, addressing the growing need for geneticists to understand statistical methods in molecular genetics. The book maintains the clarity of the first edition but includes significant updates. These include a detailed discussion of numerical resampling methods, which are increasingly used in statistical testing. It also features a full chapter on linkage mapping and additional material on DNA sequence analysis. A new chapter on individual identification, including forensic applications, is added, reflecting Weir's expertise in this area. An appendix with computer program listings from the first edition has been removed, replaced by a web reference. The book is becoming a standard text in the field, and the new edition ensures its continued relevance. The book is recommended for students and practitioners in genetics who need to stay updated with the latest statistical methods for genetic data analysis.Genetic Data Analysis II by Bruce S. Weir is a timely revision of his 1990 text, addressing the growing need for geneticists to understand statistical methods in molecular genetics. The book maintains the clarity of the first edition but includes significant updates. These include a detailed discussion of numerical resampling methods, which are increasingly used in statistical testing. It also features a full chapter on linkage mapping and additional material on DNA sequence analysis. A new chapter on individual identification, including forensic applications, is added, reflecting Weir's expertise in this area. An appendix with computer program listings from the first edition has been removed, replaced by a web reference. The book is becoming a standard text in the field, and the new edition ensures its continued relevance. The book is recommended for students and practitioners in genetics who need to stay updated with the latest statistical methods for genetic data analysis.