Not always, because in many cases, it was the movie that was created FIRST, and the book came out, later on. +5

Generally yes, with Exception of Hook, and the book sucked worse then the movie

yes in the books there is more details.

Yes and no. Books always have details that we visualize in our own minds. What we see in the movies is either the writer's idea, or the directors' ideas, not ours. Now, they may be close, and they may change our idea (what we thought), but that doesn't make them bad. Movies also have limited numbers of characters (even with "thousands of extras" or CGI), are limited in the stunts and action they can show (ratings, danger to the stunt people, etc.), and limited amount of time to tell the story (FEW movies are over 90 minutes, though more seem to go 2 hours. VERY few will go the 4-5 hours it would take to actually tell the story as the author wished it to be told.) It never bothers me to have read a book and seen a movie version of it. I can always look at as two different books (or versions) - the one I envisioned, and the one a saw. Now, when I read the book again, I see the movie characters, and SOME of the action from the movie, or my own version of it. For me, also, it heightens my awareness of what's going on if I've seen previews, as I watch each scene, expecting to see something I've seen there. AND, I love watching movies more than once. I ALWAYS catch more the 2nd and maybe 3rd time around than I did the first time. ;-)