Shadows' End - Death Hunter Series, #6

To stop the ultimate evil, Shane Ryan faces an impossible choice. Retired Marine Corps sergeant Shane Ryan has seen his share of death and violence. And as far as he's concerned, the best defense is a good offense. So when he and his friends manage to head off a supernatural attack at a nearby orphanage, he is determined to hunt down whoever is responsible for the carnage. There's just one problem.
The evil behind all this is a hopelessly deranged young boy who has developed the ability to command the restless spirits of the dead. Outnumbered and facing an evil beyond imagination, Shane and his allies must battle their way through an army of wraiths to get to this sinister child. But deep down, he knows there is only one way to bring this nightmare to an end. The only way to stop the boy is to kill him.
Can Shane bring himself to do what must be done?