We buddy-read here too.
DD just finished the Coral set from Mosdos. She's 5th grade/average student/came late to reading. I wanted something quasi-analytical (exploring plot, themes, etc., in a not-heavy handed way) and it was awesome: couldn't wait to read the next assignment and do the corresponding work. She finished the whole thing between late Oct. and now! And...she understands characters, plot, etc. without my having to really reinforce it :)
I do like the idea finding the themes of a novel or novella though: I read recently about a woman whose 7th grade English teacher made all the kids take different-colored highlighters to their paperback novels to find the big analytical themes within. Might do that next year with dd.