The Green Room: Mai Huli 'Oe I Kokua O Ke Kai, Respect the Ocean (Storm Kayama Mysteries)

Storm Kayama needs to build her clientele, so when surf promoter Marty Barstow's wife Stephanie walks into her new law office, Storm agrees to represent her, despite her distaste for a bitter divorce situation.
When Stephanie's son Ben, a promising surfer, invites her to O'ahu's North Shore for a contest, Storm jumps at the chance. Not only will it be a thrill to observe the meet, but Storm will also have the opportunity to watch a distant cousin compete. Nahoa Pi'ilani has grown from a mischievous kid to a surfer of international renown, and he seems to have put the trouble that once brewed between their families behind him.
Then a child delivers a package to Nahoa containing an ancient Hawaiian weapona wooden club encircled with shark's teeth. Storm recognizes the lei o mano. It's a threat, a call to battle.
Events soon suck her into a vortex of escalating peril - as if she were in the green room, the underwater space where tons of churning water can imprison a surfer. Storm is buffeted and disoriented by local legend, greed, and cutthroat competition and must confront not only a vicious killer but a haunting incident from her past.