Claim: The Sterile Cuckoo was adapted from a novel written by a Belgian novelist.
Evidence: The movie was adapted by Alvin Sargent from the 1965 novel by John Nichols , and directed by Alan J. Pakula , in his directing debut.
John Treadwell Nichols -LRB- born July 23 , 1940 , Berkeley , California -RRB- is an American novelist.