A two-part climax to The Last Vigil, An Agony of Flame and The Fury and the Mire, concludes the story of the fall of Constantinople. Here is an intense evocation, both of the gruelling eight-week siege itself and of the chaotic as well as terrifying aftermath. In part three, Niccolo and Demetrius serve on the great Roman land walls, enduring bombardment and nocturnal hand-to-hand combat. Nestor-Iskander reappears, a deserter now from the Turkish...