This combines two sure ingredients for popularity- it is a horse story and a circus story! The early chapters as Zan, and the tiny motherless foal meet and make friends -- then Star as a yearling colt rejoins the wild herd, and later is captured and finds his friend once more -- will appeal particularly to young people who know and love horses. Then comes Zan's chance to join the circus with the colt he has trained, and the period when both go through a new kind of training and Zan is fired with the desire to teach his lovely horse the high-stepping acts that are the goal of trainers. There's a bit of romance here, and a bit of heartbreak too; there's adventure and misadventure and an usual slant on horse and boy training.