The fifth gripping adventure in this exciting new pony-club series - now with a brand-new, commercial cover look!With gymkhanas to win, rivals to defeat, mysteries to solve and ponies in danger to save - these books are perfect for all girls who love ponies. When Aunty Hess opens a riding school for the summer, Issie and her pony-club friends go along to help out. Issie gets to know Comet, a naughty but talented pony with real showjumping promise. But can she train him in time to compete at the Horse of the Year Show? Join talented young rider, Issie, on another action-packed pony-club adventure.