The mantra "I think I can" has inspired young readers and adults for generations. Elements of The Little Engine That Could appeared in children's tales as early as the turn of the 20th century. It wasn't until 1930, however, that Arnold Munk, co-owner of publisher Platt & Munk, released something close to the modern version under the pen name Watty Piper. Many new editions have appeared since. In 1954, Lois Lenski's original illustrations were replaced by art from George and Doris Hauman, which Ruth Sanderson's work supplanted in a 1976 update. The story itself has also been altered. Later editions filled the titular Little Engine's train with toys for children on the other side of the mountain, gave identities to the unhelpful other locomotives and added a clown ringleader.On April 7, The Little Engine That Could canon expanded again with a 90th-anniversary edition featuring new art from Caldecott-winning author/illustrator Dan Santat and an introduction by Dolly Parton. Parton read The Little Engine That Could in the first episode of her "Goodnight with Dolly" read-aloud series. The anniversary edition is available from Grosset & Dunlap ($18.99, 9780593094396). --Tobias Mutter