The Lazarus Hotel — Jo Bannister

AND THEN THERE WERE NONE...
A group of six strangers meet for a weekend therapy retreat at London's newest but incomplete luxury hotel. Assembled in all of their idiosyncratic glory, the six quickly discover that no one is there by accident. They have been sought out and their presence engineered by someone whose identity they don't know, whose motives they don't understand, and whose intentions they can't begin to predict. The link that connects them all is a dead woman.

But terror closes in as the phones and the elevators at the hotel go out, trapping the group from the outside world. Then accidents begin to happen. One by one, they are being hunted. By one among them who is a killer.