This book is more than just how to pick a show quality discus, but also includes chapters on the history on development of discus strains, competition classes, environment and nutrition, discus genetics, raising discus artificially, judging, and has many photographs of show winning discus.
The authors go into detail on artificial raising of discus with many photos showing the process, and the equipment, leaving no information out.
The photography is first class, and the information enlightening. This book is a must have for any discus hobbyist.