Bestselling author James Rollins combines historical mystery and scientific exploration in his latest Sigma Force adventure. Arriving home on Christmas Eve, Commander Gray Pierce discovers his house ransacked, his pregnant lover missing, and his best friend’s wife, Kat, unconscious. The only witness, Kat is in a semi-comatose state and cannot speak—until a brilliant neurologist offers a radical approach to “unlock” her mind. What Pierce learns from Kat sets Sigma Force on a frantic quest reaching back to the Spanish Inquisition and to one of the most reviled and blood-soaked books in human history. Doors open at 6:00 p.m.