Soul Bound - Soul Collector Series, #5

The war against evil never ends.As a retired Marine, Shane Ryan has seen the horrors of war firsthand. And as the world's greatest ghost hunter, he has triumphed against supernatural terrors beyond imagination. But in all his years of fighting, he's never faced an enemy like this.Stranded in the wilderness, Shane is wounded and exhausted from his last battle. He needs food, water, and above all, time to heal.
But instead, he discovers that his war against a sinister occultist has only just begun. Hunted through the endless woods by a legion of bloodthirsty spirits, it will require every last ounce of willpower Shane possesses to survive. And these deadly wraiths are not his only enemy. For as night falls, the plunging temperature may prove to be his deadliest foe. But a lifetime of war has taught him one thing.
The battle isn't over so long as one man remains to fight. And if his enemies want him dead, they'll have to venture into the depths of hell to claim his soul.