The mind benders

Why did Professor Sharpey, the Nobel Prize-winning scientist, commit suicide by throwing himself from a fast-moving train? And why were briefcases stuffed with cash found beside his shattered corpse? Major Hall of British Intelligence suspects Sharpey was a traitor selling secrets to the Communists. But Sharpey's colleague, Dr Harry Longman, believes his friend's strange behaviour is connected with his groundbreaking experiments using an isolation tank to test the effects of sensory deprivation. There's only one way for Longman to discover what really happened to Sharpey and clear his friend's name: he must subject himself to the same frightening experiments. But the terror he undergoes in the isolation tank is nothing compared to the horror that will follow: for what emerges from the lab is no longer Longman, but something else entirely...