Shel Silverstein 's incomparable career as a bestselling children's book author and illustrator began with Lafcadio, the Lion Who Shot Back. He is also the creator of picture books including A Giraffe and a Half, Who Wants a Cheap Rhinoceros? , The Missing Piece, The Missing Piece Meets the Big O, and the perennial favorite The Giving Tree, as well as classic poetry collections such as Where the Sidewalk Ends, A Light in the Attic, Every Thing On It, Don't Bump the Glump! , and Runny Babbit.