Hotel Caledonia: Mission 7

And now for something completely different...
With Hotel Caledonia, J.S. Morin ventures into - at least for the Black Ocean books and the various spin-off series - unfamiliar territory with this whodunit reminding me of the “genre-classics” like Agatha Christie or Dorothy L. Sayers.
Only... on an alien planet. Under water. And with magic and dolphhins and my favorite crew of do-gooders.