As I have never read the books, I can't whine about how they weren't true to the books.
They were good movies, as they were.
However, as a book lover......I DO understand when a movie lets you down, and veers wildly from the book.
Dan Brown's Inferno kept fairly well to the book......more or less...........until they got to Venice......and then it was. like..........WTF?????????? The needle just completely scratched off the record.....and they changed the entire ending,.
I know Clive Cussler was so PISSED at what they did to "Raise the Titanic"......that he swore he would NEVER sell the rights to another of his books *ever* again. (and the guy has written over 70 of them since, so stood to make a FORTUNE!!!!)
He finally relented 25 years later........and let them try again with "Sahara"-
When asked what he thought of the movie, his famous reply was......."Call me in another 25 years. "
and he hasn't sold another since. A true pity too, as most of his books *would* make excellent movies.......if they could just find a director to stick to the book as written.