Melanie Graham is thrilled. She loves exercise riding, and she's good at it, too! Her aunt Ashleigh says Melanie would make a great Jockey-she's really thriving at Whitebrook.But Melanie's not alone. Her friend Kevin McLean also wants to exercise-ride, and soon Melanie and Kevin are galloping together on the Whitebrook track. Racing for fun turns serious as Melanie becomes more and more competitive, testing their friendship to the limit. Kevin thinks Melanie is pushing herself too hard. Will she slow down before it's too late?Whether jumping a cross-country course, galloping a powerful racehorse, or just riding on the trails, only one thing matters to Christina and her friends: the special bond between horse and rider. If you love horses, then you'll love reading all the books in the Thoroughbred series.