There's different levels too.
Small: You read 2 related books.
Medium: You read 4 books (2 sets of related books).
Large: You read 6 books (3 sets of related books).
Super Size: You read 8 books (4 sets of related books).
I'll just be doing the small challenge. I haven't decided on the books yet, I'll have to think about it, but I'll come up with something.
Care to join? Head on over to Melissa's blog and sign up.