'The book is an excellent primer for the novice and a good methods reminder for the experienced. Its major point, that sequential observation has been ignored, is a good one. It is written in a clear, readable, self-contained style with the exception of the last two chapters which require the use of additional resources listed in the bibliography. It contains very useful tables and figures, examples, and repeated summaries of major points made in each chapter and chapter section.' American Journal of Primatology