Gripping and tense story of secret agents, even more secret government facilities, and a deadly virus, from the acclaimed master of action and suspense. HELL IS ABOUT TO BE UNLEASHED… Five strands of high-voltage wire, 200 yards of bare ground and double barbed wire fences patrolled by armed guards with dogs separated Mordon Research Centre from the outside world. Yet behind the locked doors of E block, a scientist lies dead, and a new toxin of terrifying power has vanished…

Alistair MacLean, the son of a Scots minister, was brought up in the Scottish Highlands. In 1941 he joined the Royal Navy. After the war he read English at Glasgow University and became a schoolmaster. The two and a half years he spent aboard a wartime cruiser were to give him the background for HMS Ulysses, his remarkably successful first novel, published in 1955. He is now recognized as one of the outstanding popular writers of the 20th century, the author of 29 worldwide bestsellers, many of which have been filmed.