Serpentine by Laurell K. Hamilton — book slip

Vampire hunter Anita Blake is ready for a break as she heads to a remote Florida island for her best friend Edward's wedding. But the vacation turns into a nightmare when a new form of lycanthropy, linked to an ancient Greek curse, emerges. As women start disappearing and her friends become suspects, Anita must confront a strange power she's never faced before. With danger closing in, she must accept help from unexpected and deadly sources.

For fans of dark urban fantasy with a romantic twist.