Seabiscuit the Wonder Horse by Meghan McCarthy is not, in my opinion, one of the best horse and pony books,  but it could be just the right book for you.  The book is a true Rocky Balboa story.  Seabiscuit was the grandson of one of the greatest racehorses of all time, but he lost practically every race he ran until he was “discovered” by an automobile tycoon, a clever trainer and a loving jockey.  He began winning races, but no one believed that he could beat War Admiral, the top racehorse in the country.  It is a story of hope and determination, set in the 1930s depression era, that will inspire readers of all ages.   Ages 4 to 8 and Seabiscuit lovers of all ages.