book ending

Rating: Null/10 (26 February 2005)

I've seen the Fight Club movie but i have never read the book by Chuck, can't spell the last name. I know the ending for the movie was after the narrator realizes that Tyler isn't really a different person but his own imagination at work creating someone else. Then the final scene after Tyler is dead and the narrator shoots himself in the mouth has Marla and the narrator in the building holding hands while the other building around them are being destroyed.But I heard that the book ending was different.
Can someone please tell me what the ending to the book was because i wasn't sure if it was extremely different or basically the same.