I liked the book and the movie both of Clan of the Cave Bear. I actually have it on my kindle. :) But I read that back in 1989 or so and have read it several times.
Right now I am into the Twilight Saga by Stephanie Meyers.
I have troubles comprehending what I read for the most part But I think that the movies are following the books pretty well. I have seen a few "differences" in the movie then how the book describes scenes, but not a big difference. But everytime the "new movie" in the series comes out, I have to read the book that corresponds to it.
Flowers in the Attic...now that was a joke of a movie. That didn't do the book any justice. So that gets five thumbs downs for me. But I do like the series. :)