Graves in the sand by Brian Boland.
Living an idyllic life in the Normandy region of France, former Coast Guard officer and reformed drug smuggler Cole Williams wants nothing more than to put his turbulent past behind him. The lure of open seas still calls, but he’s content to work at a bakery and spend quality time with the love of his life and a baby daughter they both adore. 
And then Cole’s sordid smuggling transgressions suddenly surface like a marauding submarine. He’s snatched back into a dark world where oceans are simply avenues for criminal enterprise. Blackmailed with threats of prison or worse, Cole is forced to join a small international team working to prevent the infiltration of terrorists into America. The plan is to plant him among smuggling rings running drugs, weapons, human beings, and any other lucrative cargo by sea into the U.S. via the Gulf of Mexico. Ensconced as a mole among brutal criminal bands, Cole must navigate dangerous waters to uncover a deadly plot that threatens thousands of innocents in his homeland.
Cole Williams may not survive his return to sea, but he has no choice. To survive, he will have to swim with killer sharks or be eaten by them.
This was a fantastic read with some great characters. I loved the story. It was a little slow starting but once I got into it I couldn't put it down. I loved Coles character. Lots of action too. 5*.

Took a bit to get into but was a great story. Well written, and a good plot. Glad I kept on going to finish.

Graves in the Sand is a very well written adventure type book. I enjoyed the plot, characters and the author's writing. If you are a fan of high sea adventures I recommend this book. My thanks to the publisher and Netgalley for my ARC.