I always think of other people's bookcases as a kind of personality test. A while ago, I spent a weekend visiting two friends--one a toy designer and one an illustrator and graphic artist. The bookcase in my room was full of pop-up books. Most I had seen before but David Carter's shape books, which I hadn't, were there and they blew my mind. Uncle Theo's trapeze in Yellow Square made my heart happy. And the first page of 600 Black Spots. Beautiful.