Although Royal's debut novel does not quite deliver, it holds considerable promise for the future.
The circumstances of the murder are intriguing, but the solution is mundane. The ending is flat, but I won't say exactly why, because you don't want spoilers in a review.
The heroine, the young Prioress Eleanor, is interesting and likeable. The way the sleuthing skills are divided between three of the characters is odd, and not altogether satisfactory.
The author uses Modern English, as one would expect, except for the curious use of the word 'cert'. So, when asked if anyone suspected a monk of murder, a character says, "Some did, for cert". It happens a few times, and is quite jarring. Also, the dialogue is often inappropriate for the speaker. A serving girl, talking of a prioress and a brother, says, "Neither seemed comfortable in dealings with the secular world", and so on, totally out of character. More editorial effort is required, and then perhaps Eleanor and company will deliver more satisfying adventures.