Giles Yeoman is a sometimes agent for the British Secret Service.
The five-book series about Yeoman bears a well-deserved kinship to the far more famous The Avengers television. While I cannot verify the publisher's comments inside the books describing the author as the man who 'originated that transatlantic TV hit series', it is a fact that Martin Woodhouse wrote numerous stories for The Avengers throughout its longevity. These stories always dealt with the use of science to affect politics, a subject that was dear to the heart of Dr. Woodhouse.
During his writing career, Dr. Woodhouse wrote over ten novels and 70 screenplays, infusing each with his exceptional understanding of science, especially electrical engineering. This is definitely apparent in the adventures of Giles Yeoman.
Yeoman is a fairly young scientist working for an Institute doing governmental research. His expertise in guidance systems makes him a valued employee but his cynicism tends to detract from his appreciation. Nevertheless, he is considered a reasonable candidate to help a small intelligence agency known as the Seeker Section. This qualification is not one he particularly appreciates.
Seeker Section got its starts as the Scientific Section of the Department of Special Intelligence during the Second World War and grew from there. While it was Yeoman's belief that the agency remained around because the government never threw anything away, it seemed to exist to find answers to questions of vaguely technical natures.
The relationship between Yeoman and Seeker is never a good one as he considers them mostly irrelevant and they consider him totally expendable. Still, somehow they both survive several entertaining and intriguing missions.
The series took a strange twist at the end of the next-to-last escapade. Up until then, the character was one who enjoyed a small inheritance and earned a moderate salary. Still, money was often an issue. Suddenly, Yeoman and an American friend who had saved Yeoman's life on a previous mission found themselves involved in a mission behind the Iron Curtain that involved a revolutionary new process for making plastic. The upshot of the entire mission was that Yeoman and two friends would end up extremely rich. Incredibly rich. Bill Gates of Microsoft rich. Now that's worth risking your neck for!