The Lonely Hour (Bryant & May)

The Night Watcher is a gripping and suspenseful mystery that will keep you on the edge of your seat until the very end.

When four strangers meet at 4am outside a run-down nightclub, little do they know that their lives are about to take a dark and dangerous turn.

As the body of an Indian textile worker is found hanging upside down inside a willow tree on Hamstead Heath, the Peculiar Crimes Unit is called in to investigate.

But this case is not what it seems, as another victim seemingly commits suicide, leading the team to realize that they are dealing with a killer who knows what people fear most and always strikes at 4am.

With no indication of what the victims might have done to attract the attention of this mysterious murderer, the PCU must switch to night shifts and take an unconventional approach to catch him.

As they explore a night city where all the normal rules are upended, they're drawn deeper into a case that involves murder, arson, kidnap, blackmail, bats, and the psychological effects of loneliness on Londoners.

Will they be able to solve the mystery before it's too late? Find out in this thrilling and unpredictable tale of crime and detection.