American author and newspaperman whose more than 30 novels and numerous popular short stories include the highly acclaimed Andersonville (1955; filmed for television 1996), a Pulitzer Prize-winning novel about the American Civil War.

After finishing high school, Kantor became a reporter for The Webster City Daily News, of which his mother was an editor. He subsequently lived in Chicago for a number of years before returning to Iowa as a columnist for the Des Moines Tribune. He wrote many short stories for popular and pulp magazines and achieved recognition for his first historical novel, Long Remember (1934), a story about Gettysburg.

During World War II Kantor was a war correspondent with the British Royal Air Force and also served as a gunner in the U.S. Air Force. After service in World War II he became a screenwriter in Hollywood, where he adapted Glory for Me (1945), his verse novel about three American servicemen returning to civilian life, for the Academy Award-winning film The Best Years of Our Lives (1946).

In his long career Kantor also published nonfiction and several collections of short stories on subjects ranging from Chicago gangsters to life in the Ozarks. His historical novels include Spirit Lake (1961) and Valley Forge (1975).