Soul Taker - Mortlake Series, #4

Marcus Mortlake's greatest fear has returned.For paranormal investigator Marcus Mortlake, the never-ending battle against the supernatural has taken a heavy toll. Despite celebrating another birthday and finding himself in a romantic relationship, he can't shake the feeling that something is wrong.Then he sees a phantasmal figure from his wounded past. Is it just a restless spirit? Or a harbinger of an ancient evil, lingering in the woods of his childhood home? When the ghost of another old friend appears with dire warnings, Mortlake can no longer ignore the signs.
A terrifying nightmare from Mortlake's past haunts the streets. And its victims are the most innocent of all-young children. Mortlake is determined to put a stop to it before any more blood is spilled. But when all his knowledge and weapons prove useless, Mortlake realizes that his own fractured memories may be the key to stopping this sinister monster. And unless Mortlake can unravel the secret in time, an even darker power will be unleashed upon the world.