Her Highness' First Murder (Five Star First Edition Mystery)
Pretty good plotting and character development, and the author appears to have done a lot of research on the minutiae of the period, but for me the story was really hurt by a couple of glaring historical errors that completely brought me out of it. 1) a reference to Henry VIII's illegitimate son, who had been dead for ten years in 1546, as a possible successor
2) a reference to "treading the boards at the Globe," which wouldn't be built for over fifty years.
Either of these could have been easily checked with a quick Google search and excised without the least effect on the story.