Bizby and Grandpa's Desert Adventure — Mark Griffin

Ages 4 and up. Grandpa and a funny little character named Bizby, a little squirt from a yellow moon circling a big red planet, find adventure on a desert hike when Grandpa falls into a cavern and makes an incredible discovery. Bizby makes an awesome rescue and the rest you'll have to read. This book teaches the importance of not going into a dangerous place alone.