Thunderball is the ninth book in Ian Fleming's James Bond series, and the eighth full-length Bond novel. It was first published in the UK by Jonathan Cape on 27 March 1961, where the initial print run of 50,938 copies quickly sold out. The first novelization of an unfilmed James Bond screenplay, it was born from a collaboration by five people: Ian Fleming, Kevin McClory, Jack Whittingham, Ivar Bryce and Ernest Cuneo, although the controversial shared credit of Fleming, McClory and Whittingham was the result of a courtroom decision.