Witch at the End of the Tunnel

Vanity is the one thing Hali Waverly has never understood. That's about to become a weakness.
Life at the Salty Cauldron is going well...right up until a body washes onto the beach. The dead woman, who is forty years younger than her husband, had a run-in with Hali in her tiki bar the previous day. Authorities assume it was an accidental drowning, but a mark on the dead woman's neck gives Hali pause.
Grayson Hunter finds himself in a pickle when the identity of the body becomes public. Seems he was the one hired by the victim's husband to investigate her extra-curricular activities. Surprisingly enough, it turns out she wasn't having an affair. That doesn't mean she wasn't up to something nefarious.
Crossing paths has Hali and Gray partnering up for a second time, and as tense as things are between them, things are worse when they enter the world of Selfie Planet, the victim's place of business.
Vanity goes by many names, has many faces. The one Gray and Hali find themselves facing off with is dark and menacing. There's more going on than selfies and rampant narcissism, however. There's also a mirror monster and several soulless individuals walking around making things worse.
Separately, Hali and Gray are forces to be reckoned with. Together, they can handle almost anything...except maybe this.
Worlds are about to collide, and nothing will ever be the same again.