Dennis Gordon-Orr

A British mercenary arrives in pre-Revolution Cuba to help train the corrupt General Batista's army against Castro's guerrillas while he also romances a former lover now married to an unscrupulous plantation owner.

There's something pretty grisly going on under London in the Tube tunnels between Holborn and Russell Square. When a top civil servant becomes the latest to disappear down there Scotland Yard start to take the matter seriously. Helping them are a young couple who get nearer to the horrors underground than they would wish.