Slayers. Disciples of the Damned, #3

Reader Note: TV-style serial-four novella-length episodes followed by a season-finale novel. Two seasons are available (9 books total) with more to come. Content notes: frequent strong language, vampire violence/peril, adult themes.____To save her mother's soul, a slayer must make a deal with the very evil she was born to destroy. Chari Hunter lives by one rule, kill the monsters before they kill the innocent.
But when a mission goes wrong, and a vampire slips past her blade, everything she believes about good and evil starts to unravel. Now, stripped of her badge and hunted by her own kind, Chari walks the line between slayer and traitor. To save her mother, she'll have to trust the darkness she's sworn to destroy... and face the truth about the monster who might hold her salvation. In the war between light and dark, even a slayer can fall.