Through the Looking-Glass, and What Alice Found There, by Lewis Carroll

Through the Looking-Glass and What Alice Found There, by Lewis Carroll, 228 pages

This is also a really good book to revisit as an adult.  I also recommend reading it with Alice in Wonderland, as a companion piece.  If Alice is a story of her adventure into the world of adulthood, I see this book as her arrival.  But it's so fun- this is the one where you find the story of the Jabberwocky, you meet Humpty Dumpty, and life appears to be a chess game.  Just a fun work of fantasy with plenty of word puzzles.

Alice's Adventures in Wonderland, by Lewis Carroll

Alice's Adventures in Wonderland, by Lewis Carroll, 132 pages

I really think these books are worth re-reading every five years- you'll get so much more out of them.  I hated Alice in Wonderland as a child- it all seemed so ridiculous and frustrated me (I guess I was a pretty serious kid...)  But when I read these as an adult, there is so much more there- you can read it as a child's loss of innocence, a child's journey into adulthood, etc.  And the wordplay is so fun.  Also, public domain, so you can read it as a free e-book, like I did.