in my opinion You can't really compare one and other.
Books have far more detail and storyline/plot but how long does it take you to read a good book? More than a few hours i would think...
Movies have the great aspect of how your being affected by more senses hence sound and visual.
Movies don't have the privilege of putting tons of plot and history because they just wouldn't have the audience for a 10-15 hour film.
Also it's rough comparing a movie made from a book, because it's impossible to cover all the elements in the movie and much more time consuming.
The authors and Producers and also a big factor in this debate.
I would have to say Comparing movies with books is very... Rough...
Now if you were to compare Full Seasons to books. then that could make some sense even though its still hard to cover loads of detail you can prologue You're Story by having 10-20 Episodes being an hour each.
(Please feel free to tell me if i'm going too far lol)