Children's Books, E Books; Jump! Publishes Children's Nonfiction with a focus on High Interest Subjects for Beginning and Struggling Readers. Our Books Combine Vibrant Colors with Captivating Photography and Corresponding Text to Draw Readers into the Subject and Encourage Reading Success. Bullfrog Books, our Flagship Imprint, is Designed for Beginning Readers in Prek 2. Our Newest Imprint, Pogo, Focuses on Early Stem Topics for Kids in Grades 2 5, Book Publishing, Childrens Books ...