you will be hard pressed to find a more thorough account of these bird families, and even groups like the Columbiformes and Psittaciformes that are highly varied in behaviour and morphology etc are given a well rounded overview. the introductory discussion on general characteristics of the family provides details about the general biology (natural history, diets, breeding cycles and population dynamics, ecology etc.), and their interactions with humans (persecution and propagation etc.) among other concepts. as with the other books in the series, all described species and subspecies are illustrated and a field-guide style blurb is offered on each (covering physical features, abundance and distribution and any particulars about their biology like diet, reproduction etc.).
this is a great book and anyone with any kind of ornithological interest (even just a pet parrot) will find something of value in this book - Get a copy!