247 PEOPLE. SIX SUSPECTS. ONE KILLER. NO WAY OFF.The year is 2126.Detective Chief Inspector Monica Zhane of Scotland Yard is supposed to be enjoying an uneventful journey aboard a high-speed train from London to Marseille.Thirty minutes after departure, that changes.A conductor and two security officers quietly escort her to the luggage car, where the body of a prominent London barrister, Peter Sheffington, has been discovered.He's been murdered.The train hasn't stopped since leaving London. It won't stop again until Marseille.Which means the killer is still aboard.With 247 passengers and crew, no surveillance cameras in the luggage car, and only six hours remaining before the train reaches its destination, Monica faces an investigation unlike any she's conducted before.Security footage narrows the investigation to six passengers. Each has a reason to be suspected. Each has something to conceal. And one of them may be a killer.Six suspects. Six interrogations.Each has a story.Each has something to hide.And each reveals a clue that could point to murder.As the train races across Europe, Monica must separate lies from truth, coincidence from conspiracy, and suspicion from guilt.But time is running out.When the train reaches Marseille, its doors will open, and the killer could disappear into the crowd.Monica has six hours to solve a murder that no one was supposed to witness.PASSENGER 163: CRITICAL MASS is a fast-paced futuristic murder mystery filled with deception, psychological tension, and a race against time.One sitting. One story. One amazing experience. Read more