DeFelice, Jim: - nJim DeFelice is the co-author, with former U.S. Navy SEAL Chris Kyle, of the multi-million-copy bestseller American Sniper, the source for Clint Eastwoods film starring Bradley Cooper. His other books include Omar Bradley: General at War; Rangers at Dieppe; and West Like Lightning: The Brief, Legendary Ride of the Pony Express. He lives in upstate New York.n