There are a ton of movies that are either in production or are being released this year that are based on books.
Here are some of the books/authors and the IMDB link to the film so you can see who's starring!
Be Cool (March 2005) by Elmore Leonard
Because of Winn-Dixie (Feb 18) by Kate DiCamillo
Charlie and the Chocolate Factory (July 15) by Roald Dahl
Chronicles of Narnia (Dec 9) by C.S. Lewis
Constantine (Feb 18) based on a comic by Jamie Delano
Fantastic Four (July 5) based on the comics by Stan Lee
Fever Pitch (April 8) by Nick Hornby
Hitchhiker's Guide to the Galaxy (May 6) by Douglas Adams
In Her Shoes (Oct 7) by Jennifer Weiner
Sin City (April 1--no joke!!) by Frank Miller
Sisterhood of the Traveling Pants (June 3) by Ann Brashares
If you have anything to add, please feel free to do so and if you have any questions, definitely... feel free to ask!!