The Chronicles of Narnia (duh.)
The Sisterhood of the Traveling Pants series by Ann Brashares
The Song of Albion series by Stephen R. Lawhead
The Princess Bride by William Goldman
Assassination Vacation by Sarah Vowell
A Little Princess by Frances Hodgson Burnett
Romeo and Juliet, Cymbeline, As You Like It and Much Ado About Nothing, all by Shakespeare
I'm a total bookworm, so this is just a list of my all-time favorite books.