You can order a box of books from this site for $12.99. They will range from toddler to young adult books. Each box contains approximately 150 books (give or take). You can also order more age/grade specific books, but it costs a bit more. There is now an advisory on their site that due to high demand, boxes may not ship for up to 5 weeks, but for $12.99, that's a small price to pay :)
if you write a letter to a character at disney (walt disney world communications p.o. box 10040 lake buena vista, fl 32830-0040), they will send you an autographed photo back! I'm totally going to do this! For Lilli!