[2] The books concern a solitary, highly capable operative who works, usually on his own, for a British government organization, referred to as "The Bureau", which "doesn't exist".
[3] Quiller is a highly skilled driver, pilot, diver, linguist and martial artist.
Additionally, Quiller has knowledge of Chin Na—a related, complementary art that relies on advanced joint manipulation.
He also believes that guns give their carriers a dangerously false sense of security, and dislikes the noise they make.
[6] In contrast to the glamorous lifestyles depicted in the James Bond canon, Quiller's operational locations are almost always unfriendly (Warsaw in winter, the Sahara under the blazing sun, etc.).