Favorite Books?

I know books are made from paper which are made from trees, but the writing itself is not. So, what is everyone's favorite book(s). Personally I adore Anne Frank, but Out of My Mind (Sharon Draper) is wonderful too.

March 6th is world book day! See you then!

My answer isn't in the poll!  Some days, I decide to read, and others, I decide not to read.  Sometimes I read for only 15 minutes, and others, I read for up to 5 hours! (Which is very rare.)

My favorite author is Rick Riordan, the creator of Percy Jackson, the Kane Chronicles, and the 39 Clues.  I'm kind of angry because I have to wait until 2015 until I get to read The Blood of Olympus. (The last book in the Heroes of Olympus series, also by Rick Riordan. Heroes of Olympus is like a sequel to the Percy Jackson series.)

YOU READ BOOKS MADE OF PAPER!?!?!?!?!?!  I read books made of pure leather........And books made of pure pixel. (Books on the Internet)

P.S.  Yes, I voted for 3 answers.  I did that because those were the only correct answers for me that were on the poll.  I also thought it would be funny, but sadly, it wasn't.