The New York Times bestseller that brings the epic series full circle. The story of how Thomas Hunter first entered the Black Forest and forever changed our history began at a time when armies were gathered for a final battle in the valley of Migdon. Green is a story of love, betrayal, and sweeping reversals set within the apocalypse. It is the beginning: the truth behind a saga that has captured the imagination of more than a million readers with the Books of History Chronicles. But even more, Green brings full meaning to the Circle Series as a whole, reading as both prequel to Black and sequel to White, completing a full circle. This is Book Zero, the Circle Reborn, both the beginning and the end. The preferred starting point for new readers . . . and the perfect conclusion for the countless fans who've experienced Black, Red, and White.