Silverstein didn't start writing for children till he wrote "Uncle Shelby's Story of Lafcadio, the Lion who shot back" which was published in 1963. After parents and children enjoyed that book Shel Silverstein came out with another book named "Uncle Shelby's A Giraffe and A Half" in 1964.
Shel achieved game for his 1964 publication of the book "The Giving Tree." In the 1960's Shel became well know for his song writing, and many artists such as Johnny Cash sang the songs he had written. He also wrote scores for motion pictures.
Then in 1974 a collection of poems for children came out called "Where the Sidewalk Ends" The book was a success with many creatures and humorous titles; Shel was compared to the likes of Dr. Seuss and Edward Lear. In 1976 Shel put out a picture book called "The Missing Piece" and its sequel in 1981 " The missing Piece Meets the Big O" which was written as the missing piece's point of view. In 1996 another childrens book was published by the name of "Falling Up"
Shel Silverstein being a book lover and collector himself only allows his books to be hardcover with certain paper, font and binding. Even tho his books do not come in paperback, it has not hurt...