Yee-Haww! The Pony Rider Boys are on the move again! This time the boys are in the desert of Nevada, discovering the beauty and perils in 100 degree heat. It should be another thrilling ride that Professor Zepplin has taken them on!

Yee-Haw!! The Pony Rider Boys are on the move again! This time the boys are in the Ozark Mountains in Missouri. With Joe Hawk, or Eagle-eye, guiding them, Professor Zepplin and the Pony Rider Boys are sure to find many adventures in this action-packed, fourth book of this series by Frank Gee Patchin.