Riptides, Rivalries and Rigor Mortis. Jane Austen Tearoom Mysteries, #3

Cold water. Warm scones. And a corpse that won't stay quiet. Trinity Bishop thought wild swimming with her Aunt Ruby's club would be the perfect stress relief. Instead, she finds herself shivering over a dead body-again. When Pauline, a fellow swimmer, is found poisoned in her beach hut, Trinity discovers she can now see Pauline's ghost. And Pauline isn't going anywhere until her killer is caught.
Armed with five Regency-era ghosts, one swaggering pirate captain recently released from his enchanted ring, and a growing attraction to the dangerously handsome DI O'Malley, Trinity must navigate a swimming club full of secrets, and a murderer who's already killed twice.