This Side of the Grave by Jeaniene Frost

The highly anticipated continuation of Jeaniene Frost's New York Times and USA Today bestselling Night Huntress series, in which Cat and Bones face an enemy unlike any they've met before.
Danger waits on both sides of the grave. 
Half-vampire Cat Crawfield and her vampire husband Bones have fought for their lives, as well as for their relationship. But just when they've triumphed over the latest battle, Cat's new and unexpected abilities threaten to upset a long-standing balance...
With the mysterious disappearance of vampires, rumors abound that a species war is brewing.  A zealot is inciting tensions between the vampires and ghouls, and if these two powerful groups clash, innocent mortals could become collateral damage. Now Cat and Bones are forced to seek help from a dangerous "ally"--the ghoul queen of New Orleans herself. But the price of her assistance may prove more treacherous than even the threat of a supernatural war. ...to say nothing of the repercussions Cat never imagined (courtesy of Amazon)

Who can ever get enough Bones and Cat – Although I thought the story line was a little strained in this book, I love me some Bones and ESPECIALLY some Vlad or Tepesh as he can be so affectionately referred to – he’s got some big parts in this book and he has captured a little of my heart!  The humor and banter between the 3 leads kept this book moving for me.  And I am hoping for the next Night Huntress World book to be about Vlad. 

Cat definitely takes the stage in this one – emotional battle and saving the world – while I thought some of the plot was a little out there – Frost is a great writer and she still delivers!  Tragic sadness Cat has to push past while still learning to be a vampire.  Frost kept me engaged with the action.