He is the author of five books on Japanese baseball. In addition to Remembering Japanese Baseball, Fitts has written Wally Yonamine: The Man Who Changed Japanese Baseball; Banzai Babe Ruth; Mashi: The Unfulfilled Baseball Dreams of Masanori Murakami, the First Japanese Major Leaguer; and his latest book, Issei Baseball: The Story of the First Japanese American Ballplayers, which was published this year.