Too Clever by Half — Will North

Naked, anonymous, the body found bobbing in the English Channel five miles off the coast of Cornwall is a baffling puzzle for Major Crimes Unit Detective Inspector Morgan Davies and her Scene of Crimes Manager, Calum West. Davies has no victim to name. West has no scene to investigate. The post-mortem confirms that the shallow wounds marking the corpse are due to torture. Two days later, a woman reports her partner, Archie Hansen, missing. A farmer and Druid, Archie has a secret: while plowing one of his fields he's discovered an underground chamber holding a fortune in Iron Age gold and silver artifacts. Barely a month later he's the "floater" found in the Channel.