"Literature" is a little bit subjective, but I remember when I was 9, I came up with a goal of reading every Newberry Award book before I was 10. The only ones that really stuck with me (and that I purchased as an adult) were "The Twenty-One Balloons" by William Pène du Bois and "From the Mixed-Up Files of Mrs. Basil E. Frankweiler" by E.L. Konigsburg.
Some of my favorite books that I read over and over when I was a kid were: "Bunnicula," "Chitty-Chitty Bang-Bang," "How to Eat Fried Worms," "The Mouse and the Motorcycle" (I read the Beezus and Ramona stuff, too, but mice and motorcycles were more my style), the Mrs. Piggle-Wiggle series, anything by Roald Dahl, Richard Peck's books featuring Blossom Culp, and I had a huge crush on Alvin Fernald, a.k.a. Superweasel.
Oh, and I read the Bible a lot as a kid. To me, it was the equivalent of reading Aesop's Fables.