A Royal Pain by Rhys Bowen (2008)
Despite being 34th in line to the throne of England, Lady Georgiana cleans houses surreptitiously to make ends meet. She is in quite a quandary when Queen Mary asks her to entertain Princess Hannelore of Bavaria. (The Queen hopes that young Princess will cure her son’s infatuation with Wallis Simpson.) Ever resourceful, Lady Georgie finds a way (Rannochs always do) to entertain her guest properly. Princess Hanni, however, is hard to manage—she only wants to attend parties and meet young men. And there’s the problem of several deaths that occur while Princess Hanni is present. For mystery lovers who enjoy a light touch and humor.
Here is a complete list of all the books in the Royal Spyness Mystery Series