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 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 alliance with her rival Emrys, the last person she wants to rely on. 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 ... This is the stunning new dark fantasy romance from one of the top fantasy authors writing today.