As a kid, I was fascinated by the idea that the same book could exist in different forms. Both my brother and I had our own boxed set of Narnia paperbacks (his had the flat, modern covers by Roger Hane; mine had the more naturalistic ones by Daniel San Souci). But I loved the old editions at the library. After all, the books at home only had a little picture at the beginning of each chapter. The older books had line drawings by Pauline Baynes throughout–wonderful little surprises for somebody who already knew the books. Different editions of the classics with illustrations by different artists also intrigued me. I was naturally fascinated by a piece Tony DiTerlizzi recently wrote about a chance Maurice Sendak had to illustrate The Hobbit. Give it a look!