The Edge — Dick Francis

"BEWARE. MANY PEOPLE ARE NOT WHAT THEY SEEM"

So proclaims the ad for the Great Transcontinental Mystery Race, a glittering rail junket that not only promises the opportunity to race a thoroughbred on some of the world's great courses, but something more: an intriguing mystery to be enacted on board, which passengers will be invited to solve. But included on the guest list is one Julius Apollo Filmer, justifiably reputed to be the most ruthless operator lurking in the racing underworld, and he's planning a strange plot of his own. For Tor Kelsey, undercover security agent for the British Jockey Club, a scenario of imaginary mayhem is about to explode into a nightmare of real and bloody murder.