Robert Wittman founded the FBI’s Art Crime Team and tracked down more than $225 million worth of stolen art and cultural property â including a $36 million self-portrait by Rembrandt. He describes the heists in his memoir, Priceless: How I Went Undercover to Rescue the World’s Stolen Treasures.
http://www.npr.org/2011/06/24/137393980/robert-wittmans-priceless-pursuit-of-stolen-art