Makes perfect sense--I try to do this with literature circles in my very heterogenous 9th grade English classes. Anyway, I'm not sure how old your son is, but you may want to check out Teri Lesesne's
website. She wrote a book called
Reading Ladders. The concept of a reading ladder is that it's a thematically linked series of books beginning with more accessible and leading children to higher quality and more challenging literature.
I agree with the previous poster, too, that giving us a list of some of the books may help. This is the type of challenge I love!
