I'm biased because I adore this particular genre and time period, and I thoroughly enjoyed this entire series of books by Karen Harper. They are written very similarly to Fiona Buckley's Ursla Blanchard Mysteries.... almost confusingly so. This series focuses on Queen Elizabeth I, herself, solving the murders of her subjects. Absolutely fictitious activities frequent the books (Elizabeth leaving the castle in disguise to chase down clues and criminals). But, this is why it is Historical "Fiction". Although not historically accurate, they did hold my interest with their depth of character, plot, and historical abundance.
What do You think about The Fatal Fashione (2006)?