I have just learned to treat the books and movies as completely separate entities. I usually enjoy things much more that way. Some are too blatant to ignore, though, such as "I, Robot", where the filmmakers saw the book and said "Nice title", then threw the book away.
That was true of the Bourne Triology as well
I don't like it when movies change the endings - The Firm, Hunt for Red October
Most movies pale in comparison to the character development, imagery, plot and intricate storylines in the book, and instead substitute special effects
Just watch an old movie sometime
Today's generation couldn't sit still long enough to watch one, not enough action
But the depth of dialogue and plot development is staggering in comparison
Today's movies are sound bites of dialogue and require no acting
The older actors had to be on screen talking with each other for an eternity