Jim DeFelice has written over a dozen works of fiction and nonfiction for young people. His works include: Havana Strike, published in 1997, and Brother's Keeper published in 2000. He is the co-author of Dreamland with Dale Brown. He also co-authored best sellers American Sniper and American Gun with Chris Kyle. In 2014, his nonfiction ebook made the New York Times bestseller list; it was entitled Code Name: Johnny Walker. DeFelice co-authored 2015 New York Times and Publisher's Weelky bestseller American Wife with Chris Kyle's widow, Taya Kyle.