This is an excellent introduction to the field of forensic document authentication, I wish there were more books like it out there. Nickell gives an excellent sense of the approach taken by authenticators and forgers alike, and brings to light many surprising facts about the field. For a forgery and authentication novice, this book is filled with a number of wonderful insights into just how much work has to go into both tasks - you have to know much about the evolution of handwriting, the aging of inks and paper, not to mention the myriad challenges of actually distributing newly-made forgeries as if you had just discovered them. Highly recommended for the generalist and autodidact.