There are several out there.
This list is for modern book and goes through grade 7.
HedgehogBooks also has lists of modern books. They go through eighth grade.
Reading Ideas from TeachersAndFamilies has both classics and modern books. It has all the grades. Of course I am not sure of their leveling choices. I totally agree with Johnny Tremain for 8th, but Night by Weisel, about concentration camps? I’m not sure that’s an appropriate book for that age.
Usually placed near the list price on the back cover of children’s books you’ll see something like this: RL 3.2. This would indicate that the book was written with the reading vocabulary of a typical child in the second month of the third grade.
About.com has ten summer reading lists by grade level. These include both modern and classical books.