The main part of the book is divided into ten chapters, each covering one Asian primate family, subfamily or genus. These chapters all start with an overview that provides a map clearly showing the distribution of each of the family members, at subspecies level, alongside a very brief introduction to the family and a list of the species and subspecies. The list of species includes a small picture derived from the photo montages that allows a quick comparison of the features, especially the faces. This I found illuminating since having the pictures of faces of closely related alongside each other provides a good insight into some of the differences between them. At the end of each chapter there is a list of references cited in the text from that chapter. Whilst the book is in English, the Foreword and Preface are also in French, and each taxon is given an English and French name in the species accounts. There are no Asian language names in the book, presumably because this would take up a significant amount of space.
Within each chapter, each species or subspecies, (including subspecies that are no longer recognised) are provided with a double page spread, with an impressive full page photo montage on the left page and accompanying text on the right. The photo montage shows a close-up of the face (of an adult male where possible), and, behind it, males, females and young in natural habitat. The montages for six subspecies (nearly all of which are remote island taxa) are painted, but for every species and other subspecies the montage is comprised of photos. The photo montages are cleverly crafted, using similar poses where possible, so that the user can more easily compare related species and subspecies. Unfortunately, however, apart from the name of the photographers, there is usually no information about the photos – so one does not always know whether the picture shows adults, males or females, juveniles etc., or where the photos were taken.
Whilst the book includes photos of some of the rarest and most difficult primates to observe, it is by no means certain that all the photos are of wild animals, since many photographs (all the face shots, for example) have been digitally separated from their original backgrounds. One of the photos of Northwest Bornean Orangutan shows an individual eating a bunch of bananas that has clearly been cut, so this seems unlikely to be a truly wild animal. Apparently the photograph was taken at Semenggoh Nature Reserve, Sarawak, where there is indeed a wildlife rehabilitation centre. There is no guarantee, however, that all the orangutans at such a rehabilitation centre derive from the population in Sarawak, since some (if not all) rehabilitation centres are primarily tourist attractions and are known or suspected of purchasing captive orangutans to ensure their income and continued international sponsorship. East Bornean Grey Gibbon appears to be shinning up a papaya tree, so I would guess that this is also an example of an animal in captivity or semi-captivity. I spotted one obvious error in the photos, with the montage of Pig-tailed Macaque showing Long-tailed Macaques in the background instead of Pig-tailed. There may well be other mistakes that I did not notice, given that some photos are likely to be of animals in captivity.