Nightmare - Lars Kepler, Blue Door

From the bestselling author of The Hypnotist comes the second high-octane thriller featuring Detective Inspector Joona Linna Stockholm, Sweden: the lifeless body of a young woman is discovered on an abandoned boat. Later, a man is found hanging alone in his apartment. Should the deaths be treated as suicide or murder? Only four people know the answer. And one man wants them dead. Can Detective Inspector Joona Linna keep them alive long enough to find out the truth?