An intensely personal yet epic spiritual journey, ''The Horse Boy'' follows one Texas couple and their autistic son as they trek on horseback through Outer Mongolia in a desperate attempt to treat his condition with shamanic healing. When two-year-old Rowan was diagnosed with autism, Rupert Isaacson, a writer and former horse trainer, and his wife Kristin Neff, a psychology professor, sought the best possible medical care for their son -- but traditional therapies had little effect. Then they discovered that Rowan has a profound affinity for animals -- particularly horses -- and the family set off on a quest for a possible cure... ''The Horse Boy'' is part travel adventure, part insight into shamanic tradition and part intimate look at the autistic mind.