Seefer Elliot's homesite is a playground of recommendations for those who love middle grade reading. While it would be super cool of you to buy one of the Seefer Elliot books, there are plenty of other brilliant novels to sample.
One topic of discussion, Sixth Grader Reading Level Books will have an accompanying Google Hangout where you can join in and discuss your favorite reads.
I hope to see you on the Hangout. If you can't make, please be sure to check out the reading lists on SeeferElliot.com.