What happened to the storyline

Rating: 4/10 (23 May 2006)

I have recently read the entire Bourne Trilogy I couldn't put any of the 3 novels down Robert Ludlum is a great writer, it's a shame the same can't be said about Tony Gilroy who wrote the screenplay, according to IMDb "At Doug Liman's instruction, screenwriter Tony Gilroy did not read the "Bourne Identity" novel; instead, he worked solely from an outline prepared by Liman". This I feel was the film greatest let down the only similarities between the book and the film is the names of some of the characters and the fact that Jason Bourne loses his memory.
Anybody who has read the book but not watched the film I would not recommend watching it cause you will be sitting there as I was wondering why any one feels the can completely rewrite Ludlum's masterpiece.