See how the Warrior Clans came to be in this thrilling prequel arc. The rivalry between Gray Wing and Clear Sky has driven a wedge between the forest cats, and tensions are growing. What started as a misunderstanding between two brothers has spread far and wide - and now, every mountain cat, rogue, and kittypet in the forest will be forced to pick a side. Author - Hunter, Erin Illustrator - McLoughlin, Wayne Number of Pages - 352 Format - Paperback Publisher - HarperCollins Published - 2016-03-15