Iceblood by James Axler
Kane and his companions race to find a piece of the Chintamanti Stone, which they believe to have power over the collective mind of the evil Archons. Their journey sees them foiled by a Russian mystic named Zakat in Manhattan, and there is another dangerous encounter waiting for them in the Kun Lun mountains of China. One man's quest for power unleashes a cataclysm in America's wastelands.