内容简介：
A book for all agesafrom the nine-year-old who learns to be a Cloud Warrior, the teenagers with their own band named B.O.L.T. (Brotherhood of Light Travelers), to the experienced adult Cloud Warriorsaall dedicated to fighting the evil forces that could overwhelm the unsuspecting humans on Earth. Learn a new game that Angela and her friends play called cornerball, and be the first to learn the songs of B.O.L.T. While performing on stage, the teenagers become trapped in a phase shift and have many exciting experiences as they travel seven levels beneath the Earthas surface. Experience the excitement and suspense during battleaas well as the teamworkaas the Cloud Warriors of all ages work together to fight evil.