Ashbaugh has spent much of his professional career with the Royal Canadian Mounted Police studying friction ridge identification, including ridgeology and edgeoscopy. His research has rocketed him into the position of the world renowned expert on the subject. Chapters include: the history of friction ridge identification; the friction skin medium; the identification process; poroscopy and edgeoscopy; the Friction Ridge Analysis Report; an introduction to Palmar Flexion Crease Identification, and more. At the back of the book is an extensive bibliography, a glossary and an index. This book is required reading for the IAI Latent Print Examiner CLPE and Ten-Print Certification programs.