The Tower Chronicles: Dreadstalker #12

Though his past has long been a mystery, supernatural bounty hunter John Tower finally reveals the gruesome details of his former life with the only living soul he can trust: his unofficial partner, FBI agent Alicia Hardwicke. Fighting together, they must retrieve three mystical artifacts - only then will Tower be freed from his wretched curse. In the epic conclusion to DreadStalker, Tower and Alicia barely escape the clutches of a demon from the VERY depths of hell. After eluding capture, their return home is met with an unwelcome visitor.