The Fight in the Dog. Underdogs, #9

Ariadne Willow has just solved the biggest mystery in popular music. Seattle's only werewolf private investigator has just learned the true identity of Saint Artemis, a hugely-famous rock star who only performs in masks. No one knows her real name or what she looks like, but she's just revealed herself to Ari. She's been receiving threatening emails and, now that she's in Seattle for a series of shows, a physical note has been left at the house she's renting.
Ari is hired to play bodyguard to keep her safe until showtime. It's a simple case, at a time when everything in Ari's personal life is going well. Except she hasn't heard from her mother in a while. And Dale seems to be sending secretive text messages. But at least the case is easy. Until the Saint's stalker becomes bolder, and Ari begins to worry the threats might lead to very real danger.