Moon Blade by J.R. Rain

Sam doubts Detective Sherbet’s new homicide case is the work of a vampire…
Until she sees the body.
Ever since that night in Hillcrest park so long ago, Samantha Moon knew her life would be far from ordinary. She never expected the weirdest part would be watching Tammy and Anthony turn into adults. Other than her fears of an empty nest, life is as normal and happy as it’s ever been.
As if offended by her contentment, the Forces of Evil make their move.
Sherbet needs her help tracking down a vampire who appears to enjoy brazenly dumping bodies out in the open.
Worse, a family hires her to find their missing thirteen-year-old son who disappeared right around the time the vampire attacks started.
Sam will move mountains to find the boy and stop a killer…including journeying to the Himalayas to battle creatures straight out of legend.
This is Sam at her fiercest, her most unstoppable.