If you want book suggestions for your child based on their interests and reading level, try the website Book Adventure http://www.bookadventure.com/. If you set up a free account for your child, he/she can even take quizzes on some of the books. I took the quiz based on Sideways Stories from Wayside School by Louis Sachar, and I was chagrined to actually miss one.  It was a great exercise in reading comprehension though, and I recommend it. The site is created and maintained by Sylvan Learning Center.