This second book in the spin-off prequel series continues the origin story of the forest-dwelling feline Clans, this time focusing on orange tom Thunder and his complicated and troubled relationship with his father, Clear Sky. The number of characters in these prequels isn't as unwieldy as previous Warriors books, making the adventure story more accessible than usual. (c) Copyright 2014. The Horn Book, Inc., a wholly owned subsidiary of Media Source, Inc. No redistribution permitted.