This heartwarming and affirming Level 1 Ready-to-Read Graphics book celebrates the beauty of true friendship! Worm and Caterpillar are friends--best friends. Worm loves how they are just alike, but Caterpillar has a feeling there is a big change coming. Then Caterpillar disappears for a while and comes back as Butterfly. Will Butterfly and Worm still be friends? Ready-to-Read Graphics books give readers the perfect introduction to the graphic novel format with easy-to-follow panels, speech bubbles with accessible vocabulary, and sequential storytelling that is spot-on for beginning readers. There's even a how-to guide for reading graphic novels at the beginning of each book.