"This work is such a marvelous accomplishment that I would recommend to all, with even the slightest interest in evolution, buying the hardcover version to keep for a long time as standard reference to a phylogenetic understanding of structure and function in living organisms...[Avise's book] is an extraordinarily effective means to learn about and to understand evolutionary relationships. It is one of the best-written and most comprehensive books on the subject."
American Journal of Medical Genetics, John M. Opitz, University of Utah School of Medicine
"The abundance of fascinating evolutionary tales and the engaging clarity with which Avise tells them not only guarantee that this book will serve its purpose but also make it a 'must-have' for all enthusiasts of evolutionary biology."
Andrew J. Roger, Nature Genetics, December 2006