What is the Moon Author:Chris Arvetis and Carole Palmer "What's that big bright circle in the sky?" asks Christopher. Wise Owl knows it's the moon. And she tells Christopher all about the craters, valleys, and highlands that are on the moon. — The JUST ASK series explains the world to your child. In simple words and colorful pictures, these Weekly Reader books answer the questions your youngster lo... more »ves to ask.« less