The Murder at the Vicarage by Agatha Christie

The famous novel in which the Queen of Crime introduced one of her most beloved characters, the indomitable Miss Marple. St. Mary Mead appears to be a typically quaint English country village, but many dark secrets lurk under its placid surface--and its most unobtrusive resident, the elderly Miss Jane Marple, is equally easy to underestimate. When Colonel Protheroe, the exceedingly disagreeable local magistrate, is found shot to death in the vicar's study, the police are confounded. Nearly everyone in the village had good reason to wish the man dead, witness accounts conflict, and two contradictory confessions further muddy the waters. Suspects abound, including an archaeologist on a local dig, a young visiting artist, an unhappy wife, a local poacher, and a mysterious woman just arrived in town--and, of course, the vicar himself. But the vicar's observant neighbor, Miss Marple, notices far more than most. An adept and shrewd student of human nature, she is the only one clever enough to untangle the clues and solve the mystery.