Yes, another old mystery.
As is common with Barnard, we get the murder smack dab in the middle of the book, so there’s plenty of time to get to know the suspects (and we get the added mystery of who’s going to be killed). It works well here — there’s a varied bunch of characters, and I couldn’t guess whodunnit at all.
But the actual denouement felt pretty weak — the detective just had a brain storm and AHA! Still, a perfectly pleasant read.
At Death’s Door (1988) by Robert Barnard (buy used, 3.48 on Goodreads)