Brian Kelly's job is to devise an undetectable bomb and then to plant it inside the impenetrable security rings of a castle that is to be the site of a conference between British Cabinet officers and the Ulster Prime Minister. With the viewpoint switching from the tough and clever Kelly to the dogged but thorough British Army Intelligence team, the suspense builds as the opposing forces - and that hypersensitive bomb - slowly come to crisit positions. This is a neat British job, solidly plotted, and full of details of demolitions procedures and intelligence operations.
Used availability for Donald Seaman's Kelly's Bomb