Thin Air by Ann Cleeves (2014)
Four friends have come up from London, to the island Unst to celebrate a friend's wedding. The wedding is lovely, and the friend stay up late in the white night, drinking and talking. One of the things they talk about is Perrie Lizzie, a local ghost story. When the rest of the group goes to bed, Rebecca decides to stay outside for a little longer. In the morning she is gone, and Polly receives an e-mail with the suicide note. The body is found in a small loch. But is it suicide or murder? Perez and his team take the case.
The 6th Shetland books is just like the rest. Perez and his team, a murder or more, and the beautiful nature of Shetland. The plot is good, the story exciting and the ending very happy. I'm still torn about the fact that the series continued after the 4th book, which was the perfect ending, and I'm actually hoping that this is the last. But Ann Cleeves should definitely continue to write crime novels. I'll read them.