[BrandonMarc]

Fight Club is one of those rare cases where the author himself preferred the movie's ending to his own written ending.

http://tvtropes.org/pmwiki/pmwiki.php/Film/FightClub

[grogenaut]

Non-Sarcastic Thank You for taking the time to explain what I thought was self evident if you had seen the movie and read the book.

[Crito]

See also: The Mist.

Stephen King apparently hated the ending he wrote for the short story, but praised the ending of the 2007 film adaptation.