Below Deck

From the author of Below Deck: Hell or High Water
The Below Deck series of books, from horror author Matt Shaw, are stand-alone tales of horror. The characters are the same in all of the stories but the stories are separate from one another. Therefore, you do not have to have read any of the other books within the series to understand what is going on, or who the people are.
Synopsis:
As Captain Lee navigates the crystal blue waters, taking his guests out to some of the most fabulous locations, he and his crew come across an injured mermaid. Entranced by the mythical creature's beauty, they listen as she tells of a secret island of sheer paradise, which is known to but a few.
In exchange for helping her get home, the creature promises to show them the way to the island so they can experience the paradise for themselves. However, once onboard, they realise she wasn't quite as injured as she made out and, she wasn't alone in those tropical waters... Something bigger and hungrier is also lurking beneath the waves, waiting for the perfect moment to strike, and feast on the blood of the freshly dead.