The perfect gift for cosy crime puzzle fans this Christmas. Follow detective aficionado and retiree Harvey Rivers as he traverses Britain's idyllic canal network, uncovering murder and intrigue along the way. You will need to draw on all your powers of logic and deduction to help him solve these 100 original murder-mystery puzzles. Challenges abound as Harvey encounters mysterious characters on his journey. You are tasked with solving logic puzzles related to Harvey's story.

Life is about to take a dramatic turn for Harvey. His peaceful days on the canal are brutally disrupted when the crime novels he adores become startlingly real. When his friend and fellow crime enthusiast, Fred, dies in mysterious circumstances, Harvey sets out on the trail of the killer.

The chase takes him past placid villages and through sprawling cities, following the devastation the murderer leaves in his wake. He struggles to contain a fire at the locks, fights off an attempted boarding, rescues kidnapped animals, and saves many others from meeting Fred's fate.

Events come to a head at a detective convention by the mouth of the river. The killer murders one of the guests and assumes their identity, intending to wipe out every detective in a single stroke. Only Harvey, arriving late in his battered narrowboat, can stop this hideous crime from taking place.