"Seventh-grader Willa is head-over-hooves when she finds a secret note inviting her to Juniper Ranch--a sleepaway camp that's all about horses. The camp promises trail rides, horseback swims, and "ghorst" stories, plus tons of new horse-girl and (gasp!) horse-boy friends. Even better? Willa's pals from Oakwood Riding Academy--including her sworn frenemy, Amara--are all coming along for the fun. But when Willa makes a dangerous mistake and a beloved...