Season of the Witch

Set in London, Natasha Mostert's thriller mixes murder, mysticism, alchemy and the art of memory. Gabriel Blackstone is a computer hacker by trade and also a remote viewer, able to slip into other people's minds, though he uses the gift only reluctantly. That changes when a former lover asks him to find her stepson, who was last seen months earlier with two sisters. The search takes Gabriel to Monk House, a house where time appears frozen and a coded cross-and-circle symbol dominates the rooms.