The Brothers Cabal — Jonathan L. Howard

Horst Cabal has risen from the dead. Again. Horst, the most affable vampire one is ever likely to meet, is resurrected by an occult conspiracy that wants him as a general in a monstrous army. Their plan: to create a country of horrors, a supernatural homeland. As Horst sees the lengths to which they are prepared to go and the evil they cultivate, he realizes that he cannot fight them alone. What he really needs on his side is a sarcastic, amoral, heavily armed necromancer.

As luck would have it, this exactly describes his brother.

Join the brothers Cabal as they fearlessly lie quietly in bed, fight dreadful monsters from beyond reality, make soup, feel slightly sorry for zombies, banter lightly with secret societies that wish to destroy them, and--in passing--set out to save the world.