A thousand years from now, the Grail is lost, and the fate of a dying world hangs on a single knight's choice. The climate catastrophe is long past, but the Green Land still trembles under war. In the ashes of empire, Sir Percival seeks truth through a quest for the Grail, a key component of the failing Great Machine, which keeps Earth's climate in balance. Dame Lancelot du Lac is bound to the kingdom of Viridiae by duty and desire, and Queen Guinevere risks everything for love and survival. As rival kingdoms battle for power, ancient legends reawaken in a far-future world of swords, faith, and fire. War for the Green Land is the second book in the Future History of the Grail, an epic saga inspired by Arthurian myth, set in a post-collapse Earth. The first book is Fall of the Green Land. The third novel is Return to the Green Land. Perfect for fans of T.H. White's The Once and Future King , Katherine Arden's The Bear and the Nightingale , and N.K. Jemisin's Broken Earth trilogy.