The following are popular around your age and reading level:
Daddy-long-Legs by Jean Webster
Holes by Louis Sachar
Lion, the witch and the wardobe by C. E. Lewis
Double fudge by Judy Blume
Poppy by Avi
Ink Heart by Cornelia Funke
Tale of Despereaux by Kate DiCamillo
Beacause of Winn-Dixie by Kate DiCamillo
Dragonwing by Laurence Yep
How to eat fry worms by Thomas Rockwell
Harry Potter series
A series of unfortunate Events series
Magic Tree House series
American Girls series
Charlie Bone series
Dragon Rider series
The following link is Barnes and Noble Newbary Medal award book list, you can take a look to find some books that you will like.
http://browse.barnesandnoble.com/browse/nav.asp?visgrp=children%27s&N=700197+3023+800001228&Ne=700197&z=y
Happy Reading!