Watcher in the Shadows (Unabridged‪)‬

When a parcel bomb explodes on Charles Denham's doorstep he realises that an enemy from the past is out to destroy him. This is the thrilling story of a man being hunted by an unidentified assassin across rural Buckinghamshire and then the Cotswolds in the mid 1950s. The last quarter of the book takes place over one night as the hero (and his previously unseen enemy, the "watcher in the shadows") agree to have a duel while out riding on the Cotswolds.