In this return to Mustang Mountain, Becky and Meg look forward to summer vacation at the ranch despite the fact they are joined by Becky's sometimes annoying cousin Alison. But Alison's presence soon becomes more than just an annoyance when she sends Meg's friend Thomas on a wild goose chase in search of a phantom horse named Diablo. As days pass and Thomas fails to return, the girls fear something terrible has happened to him. But as they search for him in the mountain wilderness, they realize he is not the only one in danger. Will they all make it back to Mustang Mountain safely? SHARON SIAMON is a highly successful author of many juvenile fiction titles published in North America, England, and Scandinavia. BRAVE HORSE is the sixth title in the Mustang Mountain Series.