The Fortress Beneath the Tide

Off the Cornish coast, a hidden sea fortress swallows ships and men. Chemist and Lamplighter agent Beatrice Arkwright is abducted alongside the disgraced scientist Samuel Rath and taken before the pirate Ker Karraje. As Rath regains his brilliance and builds a terrifying new weapon, Beatrice maps their prison and watches for the moment knowledge can become escape.