Fahrenheit 451 was originally serialised in the earliest issues of Playboy magazine in the 1950s. Ray Bradbury's short stories also found a home in the magazine from the 1950s onwards. Given Bradbury's somewhat wholesome image - this is the man whose stories are taught in schools all across the US, after all - it may be surprising that he should be associated with the Hefner empire. However, Bradbury and Hefner have been good friends for decades.
Earlier this year, Bradbury and Hefner appeared together and talked about the F451-Playboy connection for the Writer's Guild of America, West. Here is the video of their discussion.