In the Hall with the Knife by Diana Peterfreund
My rating: 3 of 5 stars
Not really sure what more to say than this is a "locked room" (locked island?) mystery with characters named Peacock, Greene, Plum, White, etc.. There's a library, a conservatory, hidden passages and all the other things you'd expect from something based on the board game. There's even a sort of cliffhanger that definitely leads to Book Two - will the same characters reappear, or will we meet new ones?
eARC provided by publisher.