Why Announce a Murder?

Well apparently to avoid suspicion. Or so it would seem from what I have read so far in A Murder is Announced by Agatha Christie.

It seems that the ad in the local paper was a ploy to get a number of people into one place so that suspicion will not fall anyone - well if everything went to plan, which it never seems to do in this sort of books. It's like it is fiction or something. Anyway it is all very dramatic and someone does end up dead, but you get the feeling that there should have been more than one death.

Tension is mounting.