Loads of the movies made in Hollywood start life as wonderful books! For instance:
Around the World in Eighty Days by Jules Verne (you can pick up an e-book of this here)
Bridge to Terabithia by Katherine Paterson
Stormbreaker by Anthony Horowitz
Matilda by Rolad Dahl
The Kite Runner by Khaled Hosseini
The Black Cauldron by Lloyd Alexander
The Sheep-Pig by Dick King-Smith (this was filmed as 'Babe')
The Tale of Despereaux by Kate DiCamillo
He's Just Not That Into You by Greg Behrendt and Liz Tuccillo
The Jungle Book by Rudyard Kipling