The instant No. 1 New York Times bestseller from the critically acclaimed author of Lore and The Darkest Minds series. From underground Boston to the cursed ruins of Avalon, join a deadly hunt fuelled by love, revenge and pure adrenaline to find a legendary ring and break the curse. 'Simmering with magic, peril, romance, and heartbreak' - Leigh Bardugo, author of Shadow and Bone 'Nail-biting. Gut-wrenching, action-packed and devastatingly romantic' - Jennifer Lynne Barnes, author of The Inheritance Games Tamsin Lark is a Hollower. In search of treasure, she breaks into the ancient crypts of dark sorceresses. Now, rumours are swirling about a powerful ring from Arthurian legend, a ring that could free her brother, Cabell from a curse. But they aren't the only ones who covet it . . . As word spreads, greedy Hollowers start circling, and many would kill to have the ring for themselves. Tamsin is forced into an alliancewith her rival Emrys - rich, handsome, charming to a fault, and the last person shetrusts. Together, they dive headfirst into a vipers' nest of dark magic, and expose a deadly secret with the power to awaken ghosts of the past and shatter her last hope of saving her brother . . . Deliciously addictive high-stakes fantasy.