Maigret Hesitates by Georges Simenon, translated by Lyn Moir, Harcourt Brace Harvest Book 1970 mass market paperback, mystery. Number 68 in the series.

Not my Harvest Books copy
The Blurb: When a series of letters, written on expensive stationery, arrive at Maigret’s desk stating that a murder will take place but that the writer is unsure as to who will die, who will do the killing, and when the killing will occur, Maigret’s interest is piqued and he soon tracks the stationery down to the house of Emile Parendon, an eminent lawyer. But, once there, tracking down clues to a crime not yet committed is not so easy and when a murder does take place the choice of victim surprises even Maigret.
My Take: This later entry in the Maigret series is wholly psychological, with little in the way of crime excepting the murder on page 109. The rest is Maigret talking to, interviewing or thinking about the various members of the household of the large luxurious apartment suite of a very wealthy family in Paris.
Though finely crafted, as are all of Simenon’s books, this one is slow moving throughout.
I hadn’t read a Maigret novel in two or three years, and having a large number of them on the mystery shelf unread, took this one at random and moved it to my small TBR bookcase, where it now rose to the top.
I admit I grew impatient a couple of times, wanting some action, but had to remind myself that it was a Maigret novel, not a thriller. In the end, I enjoyed it and I’m glad I read it.