Lord of Misrule by Rachel Caine

Summary: In the college town of Morganville, vampires and humans coexist in (relatively) bloodless harmony. Then comes Bishop, the master vampire who threatens to abolish all order, revive the forces of the evil dead, and let chaos rule. But Bishop isn’t the only threat.

Violent black cyclone clouds hover, promising a storm of devastating proportions as student Claire Danvers and her friends prepare to defend Morganville against elements both natural and unnatural.

Each one of these books get better! This is my favorite book of the whole series so far.