Righteous Prey ( Lucas Davenport, Book 32) by John Sandford

In "Ocean Prey," Lucas Davenport and Virgil Flowers team up to solve a deadly maritime case. An off-duty Coast Guardsman reports suspicious behavior from a nearby boat, leading to a shocking discovery:

A diver alone in the ocean, picked up by the boat. When three Guardsmen investigating the case are shot and killed, the FBI takes over. But when their investigation stalls, they call in Lucas Davenport. As the case turns lethal, Davenport enlists the help of Virgil Flowers, a detective with a fundamentally criminal mind.

Together, they must navigate the treacherous waters of the case, bringing in every asset they can claim to solve the mystery and bring the perpetrators to justice. With Sandford's signature blend of suspense, action, and wit, "Ocean Prey" promises to be a thrilling addition to the Lucas Davenport and Virgil Flowers series.