Leapfrog is a series of first reading books for new readers and older reluctant readers. The stories are presented in large-text format and are accompanied by full-colour illustrations. Jasper and Jess - In this story about friendship, Jasper is a large Old English Sheepdog who loves to chase his enemy, Jess (the rather smug cat who lives next door), around the garden. But one day, Jess has a nasty accident and Jasper unexpectedly comes to her rescue.