Mine was Wind in the Willows by Kenneth Grahame. I had the hardback book, and I probably read it somewhere between 150 and 900 times. I loved getting lost in Toad Hollow, and following the shenanigans of Toad, Mole, Rat and Badger. My Mom and Dad built me a window seat in my little bedroom when I was a kid - it had a cute little cushion and curtains that I could pull across the opening for privacy (all lovingly sewn by my Mom). I loved that window seat! :)
So what was your favorite childhood book? What did you love about it? Have you read it to YOUR kids?