Thomas the blue train works all day while Percy the green train works all night. But what exactly do they do? Told in the simplest language, here is a charming tale of a day and night on the Island of Sodor.  Bright and Early Books are perfect for beginning beginner readers! Launched by Dr. Seuss in 1968 with The Foot Book , Bright and Early Books use fewer and easier words than Beginner Books. Readers just starting to recognize words and sound out letters will love these short books with colorful illustrations.