The subtitle is an accurate description: "An illustrated and annotated key to the Anisoptera." The book is a key to the 195 dragonfly genera of the New World. The description of each genus includes drawings, distribution map, list of species with state of classification, a brief description of the genus, and references to literature on individual species.
While the entire hemisphere is treated, the authors consider the book most valuable as a guide to the diverse and obscure drangonflies of the tropics and South America.
A limited preview is available on Google books