The book is "Rhacodactylus: The Complete Guide to their Selection and Care"
Philippe has it available on his website:
http://www.giantgeckos.net/giantgeck...id=2&Itemid=59
You can also find it on amazon and barnes and noble I bet.
I rarely ever consider books written about reptiles and their care to be worthwhile, as more often than not they contain poor information that is trumped by simple google searches, but this book is really fantastic. It overviews all rhac species, even the rarer ones, provides great info on care, and even the info on morphs seems surprisingly current despite being 7 years old. Also it has great full color photos!