Death Crucible by William Stacey Book 6 Supernatural Activities Division

When a Russian mage possessed by an Atlantean lich steals an ancient artifact, Wyatt and Cloe must team up with the Russians in a race to save the world. The ancient lich wants to restore the imprisoned Outer God as the rightful ruler of Earth.

As with all of Stacey’s novels, this is so action-packed that you’ll be unable to put the book down until the last spell is cast.