If the lights are on, a stalker can see you from outside. But if the lights are off, you can't see a stalker who is already inside the house.
A video-clip is sent to the National Criminal Investigation Department. Someone has secretly filmed a woman through her window from the garden. The next day she is found dead after a frenzied knife-attack. The police receive a second film of another unknown woman. There is no way of identifying her before time runs out. When her husband finds her he is so traumatised that he cleans the whole house and puts her to bed. He may have seen a vital clue, but is in such an extreme state of shock that the police are unable to question him.
Lars Kepler is the pseudonym of critically acclaimed husband and wife team Alexander Ahndoril and Alexandra Coelho Ahndoril, authors of the No. 1 internationally bestselling Joona Linna series. With seven installments to date, the series has sold 13 million copies in 40 languages. The Ahndorils were both established writers before they adopted the pen name Lars Kepler, and have each published several acclaimed novels.