White, Randy Wayne.
Summary: "Murder, sunken treasure, and pirates both ancient and modern send Doc Ford on a nightmare quest in the thrilling new novel in the New York Times-bestselling series. Marine biologist Doc Ford has been known to help his friends out of jams occasionally, but he's never faced a situation like this. His old pal Carl Fitzpatrick has been chasing sunken wrecks most of his life, but now he's run afoul...
Format: text
Publisher / Publication Date: G.P. Putnam's Sons 2018