The Windsor Knot by SJ Bennett
When a young Russian musician is found dead at Windsor Castle, Queen Elizabeth doesn’t think the investigation by MI5 is headed in the right direction. With help from her new assistant private secretary, Rozie Oshodi, a veteran and daughter of Nigerian immigrants, the Queen secretly makes inquiries. In the spring of 2016, the Queen is soon to turn 90, and enjoys talk of horseracing, walks with her dogs, and giving well-deserved honours. The mystery is clever and intricately plotted, but I most enjoyed the characterizations of the Queen, who is depicted as shrewd, loyal, and an excellent judge of character, and of Rozie, along with the wonderfully described setting of Windsor Castle. The first book in a planned series, this compulsively readable and engaging mystery is sure to delight fans of The Crown and readers of British mysteries with amateur sleuths.