One Grave at a Time by Jeaniene Frost

Having narrowly averted an (under)world war, Cat Crawfield wants nothing more
than a little downtime with her vampire husband, Bones. Unfortunately, her gift
from New Orleans' voodoo queen just keeps on giving-leading to a personal favor
that sends them into battle once again, this time against a villainous
spirit.

"Cat and Bones are combustible together." #1 bestselling author
Charlaine Harris.

"The Frost name guarantees quality!" Romantic Times.