I enjoyed this book much more than I expected to. The author is very skilled at weaving the history and culture of the period into the story without inserting long lectures that stop the movement of the story. I liked the main character, Matthew Shardlake, even with his flaws and religious zeal. I hope Brother Guy turns up in a later book, though I agree he sounded Russian rather than Moorish. (I have found the same thing with other narrators trying to do a Middle Eastern accent.)
I considered giving the book a 5 but it could have done with one less murder. And Shardlake did seem to flounder, accusing almost everyone of murder at some point in the story. There weren't many options left by the end.
I have now finished all four of Ruth Downie's series. The stories and characters grew better with each volume and I can't wait for the next one. Simon Vance is a great narrator. I love the continuing characters that run throughout the four books. I recently listened to the first book in Maddox's SPQR series and was disapointed, having enjoyed the Medicus and his adventures so much.
A treat to listen to. The story moved well and surprising twists kept the reader guessing. Each book has gotten better. I am looking forward to the next. I would have given the story a 5 but I agree with some others that the setting could easily be changed to another time period except for a few details. The Roman aspect could be stronger.