Adam Guillain & Charlotte Guillain 
Reading Planet — On the Moon — Yellow: Comet Street Kids [EPUB ebook] 

Comet Street Kids reading books follow the adventures of Rav, Asha, Tess and Finn, four of the residents of Comet Street. There are 72 exciting stories in the series that children won’t be able to put down. The Comet Street Kids are on a ride at Planet Zoom when they find themselves in space for real! They enjoying bouncing around on the surface of the Moon, until they meet an unhappy astronaut who’s lost his rocket. Will they be able to help? Reading age: 5-6 years