Monster Hunter Vendetta

Owen Zastava Pitt used to be an accountant. Now he hunts monsters for a living, and he is good at it. A year ago he wrecked the invasion plans of an Old One, and that act made him an enemy of one of the most powerful beings in the universe.

The Church of the Temporary Mortal Condition, a death cult, wants Owen captured so it can win favor with the great Old Ones. A fanatical necromancer called the Shadow Man leads it.

The government wants the Shadow Man taken. To that end it assigns Agent Franks, a puzzling figure, as Owen's full-time bodyguard. In practice Owen is the bait, and he knows it.

Supernatural assassins go after his family, and a spy is hiding among the people he trusts. Creatures wait around every corner. Owen and the crew of Monster Hunter International no longer need to seek out their targets, because the hunt has come to them.

This is urban fantasy built around firearms and action, with a bait who is armed and dangerous.