Need young adult book help!

My girl is in 7th grade. She needs to read two books by the same author. They need to be about 200 - 250 pages each. It cannot be a book that has been made into a movie. She likes adventure books, romances and puzzles. She loved the entire series of Twilight. Some of her favorites when she was younger were Because of Winn-Dixie, Judy Blume, Holes, Calder Game.

What are your suggestions for her?