3.5 stars, rounded up
This was recommended by a GR friend whose opinion I trust, and it was part of the Audible+ collection that survived the recent purge, so I decided to read it before it's withdrawn like so many other books.
Sister Joan, the MC, came to the Order later in life, so she's got more experience with... life than many others in the Order, and I like that about her. I've never quite understood those who decide to follow the rules of strict religious orders without question. To be honest though, Sister Joan *does question some of what's going on, and she uses her own common sense to make decisions about the answers she discovers, something else I like about her.
At the heart of the story are a death that's been declared an accident, and the disappearance of a young nun. Sister Joan is met with some resistance when she asks questions about both women, but she perseveres and eventually learns the truth. I had my suspicions about who was involved, and was partially right but not entirely.
I have added the next several books from this series to my to-read shelf, and hope to get to the next book relatively soon.