Kitty and the Silver Bullet by Carrie Vaughan (#4 in the Kitty Norville series) 2008 (326 pgs)
When her mom calls with a cancer scare, werewolf DJ Kitty breaks her banishment from Denver and risks the wrath of her former Alpha to rush to her mom’s side. And then things get complicated. Kitty finds herself smack dab in the middle of not just a werewolf power struggle, but a vampire one as well. Kitty has to figure out who’s pulling the strings; how to keep from becoming anyone’s pawn; and keep herself, her boyfriend, and her family alive in the process.