NOW..
My name is Matthew McConnell. You've probably heard my story.
I took five of my friends on a boat through the longest canal tunnel in England.
YOU...
It takes two hours and twenty-six minutes to travel through that tunnel.
Six of us entered that tunnel but I was the only one to come out.
DON'T...
It was pitch black in there - I don't know what happened to them. But I'm the only suspect.
And if I don't find out how they disappeared, I'll be sentenced to murder.
Read MoreA FANTASTIC whodunnit with more twists than a Great Hotel corkscrew. - Jenny Blackhurst on Guess WhoAn impressive debut and a sign of great things to come. - James Oswald on Guess WhoAn ingenious twisty mystery in a totally unique setting. - Claire McGowan on Guess WhoGuess Who boils with claustrophobic intensity. Packed with gripping twists and turns, Guess Who is an inventive, entertaining locked room mystery that kept me utterly hooked. - Adam Hamdy on Guess Who