This story reminded me so much of Christie's And Then There Were None and Clue/Knives Out.   It's a whodunnit story where characters are picked off one-by-one until ultimately we learn who murderer is. While I liked the story, I found it extremely predictable.  I was sure I knew the culprit after the first few chapters and turned out being correct.  I didn't really care much for the voice acting. The actor's voice was monotone and hard to focus on. I didn't feel engaged and often had to re-listen because I stopped paying attention.