I am a big Elizabeth Peters fan, I like the Jacqueline Kirby character, love isolated-house-party mysteries, I'm even interested in English history but I did find this a bit of an effort to get through. It is NOT up to the standards of SEVENTH SINNER much less the Amelia Peabody series.
Jacqueline Kirby is visiting England, she mets an old friend and former colleague, Thomas, who invites her to join him at a country house party/seminar. The purpose of the group is the study of Richard III, particularly establishing his innocence. The usual eccentric cast of characters is assembled and the requisite series of attacks begins. Naturally Jacqueline solves the crime before anyone else.
On the plus side we get to see more of Ms Kirby in action, learn a bit more about her life (is there a MR Kirby?) and see her solve another interesting mystery. One the negative side we meet a bewildering array of characters who are sometimes referred to by their first names, other times by their last or by the character they are portraying at a costume party. The plot development is a bit ragged and the descriptions of the characters is not always consistent. I found myself backing up and re-reading some sections in order to follow the story which is a bit more work than this type of story warrents.
If you are a Jacqueline Kirby fan you will want to read this one but if you are filling time until your next Amelia Peabody fix you might want to try something else.