Showing Shark's Teeth by T. A. Pratt

Sorcerer Marla Mason isn't particularly good at relaxing, so even in a beautiful resort hotel on the island of Maui, she can't help but go looking for trouble. When she meets a shark god whose powers were stolen, she offers to help him get it back -- but that's easier said than done.

This story takes place directly after the events of the Marla Mason novel Broken Mirrors.