Blue lightning - Ann Cleeves

Shetland Detective Jimmy Perez is returning to the Fair Isles to introduce his fiancee, Fran, to his parents. But it's a close community: strangers are welcomed - with mistrust. And as the autumn storms rage, the island feels cut off from the world. The islanders are trapped; tension is high and tempers frayed. Enough to drive someone to murder... When a woman's body is discovered at the Fair Isles bird observatory, with feathers threaded through her hair, the islanders are fearful and angry. So, with no help from the mainland, Jimmy, assisted by Fran, investigates a cold, calculated murder. With no way off the island until the storms abate - Jimmy must work quickly. There's someone on the island just waiting for the opportunity to strike again...