The wildly popular series continues with a new adventure and an all — new cover design!

Summer is ending, and Samantha's dad's birthday is right around the corner. When her stepmom picks out a mustang for his present, Sam thinks it's a perfect idea. But will her dad agree?

The new horse is gorgeous, but he's also energetic and willful. Only Sam's dad can tame him — if he wants to accept the birthday gift at all.