The Murder At The Vicarage

Description for THE MURDER AT THE VICARAGE by Agatha Christie:

KILL AND TELL

It came as no great shock when Colonel Protheroe was found shot to death. The Colonel had earned the hatred of almost everyone in the village. The question was: Who had gotten to him first?

The police relaxed when their first suspect confessed. They became uneasy when their second followed suit. By the third confession, they were tied up in knots--and only the sure hand of the remarkable Miss Marple could unravel the tangled skein of deception spun by a maddeningly elusive murderer.

This is #1 in Miss Marple series.