The Black Death returns to London in “Mark of the Plague,” the thrilling sequel to Kevin Sands’s “The Blackthorn Key.” Christopher Rowe must solve deadly puzzles and riddles to uncover a dark conspiracy as a mysterious prophet predicts London’s doom. With an unknown apothecary’s cure threatened by assassins, Christopher and Tom risk their lives to untangle the truth, facing higher stakes than ever as the plague strikes close to home. Get your copy now! ISBN: 9781481446754