The first in this series was ok, I found the second unexpectedly great, then the third seemed to be unavailable. That seemed curious as the others are on Kindle, but the reviews of the third seemed to think it wasn’t as good, so I skipped straight on to the fourth. A decent story; I like the classic Cambridge college style of the mystery brought into the present day world. There’s something a bit anachronistic about it but it is enjoyable. It’s a pity it seems to be the final entry in the series really.