Priceless, written by Robert K. Wittman and John Shiffman, is a riveting memoir that details the author's experiences as an undercover FBI agent specializing in art crime. Wittman shares his thrilling adventures, from going undercover to infiltrate criminal networks to recovering stolen artworks worth millions of dollars. This book provides a unique perspective on the world of art fraud and theft, offering insights into the methods used by criminals and the challenges faced by law enforcement agencies in combating this illicit trade.