Destined for an Early Grave: Night Huntress, Book 4 by Jeaniene Frost
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Summary
Since half-vampire Cat Crawfield and her undead lover Bones met six years ago, they've fought against the rogue undead, battled a vengeful Master vampire, and pledged their devotion with a blood bond. Now it's time for a vacation. But their hopes for a perfect Paris holiday are dashed when Cat awakes one night in terror. She's having visions of a vampire named Gregor, who's more powerful than Bones and has ties to her past that even Cat herself didn't know about.