The Manatee Murders — John D. Mills

When three beheaded manatees are discovered floating in Pine Island Sound, Detective Doug Shearer begins one of the most intense investigations of his career. A local commercial fisherman is arrested, but when two more manatees wind up dead, Doug suspects that more than just one killer. With the aid of prosecutor Roger Barklett, Doug endeavors to solve the crime, even as his personal life falls to shambles. Will he be able to pick up the pieces in time?