Some books I wish were made into movies would be Ender's Game, and Ender's Shadow, by Olson Scott Card. Although they are not a series, they portray the same story. The books are very teen friendly in the way they are written, but they have very in depth and hidden concepts and morals that most would skip over.
Another book that I wish was a movie would be City of the Sun by David Levien. This book is more for adults, as it deals with kidnapping of a child, and all the steps the family has to take to get their child back. It's quite a graphic novel with many twists and turns and a "tearjerker" ending. Definitely fit to be a movie.