Murder at the vicarage

The Murder at the Vicarage is a mystery novel by the British writer Agatha Christie, first published in the UK by the Collins Crime Club on 20 October 1930 and in the US by Dodd, Mead and Company later in the same year. The UK edition retailed at seven shillings and sixpence and the US edition at $2.00.
It is the first novel to feature the character of Miss Marple and her village of St Mary Mead. The character had previously appeared in short stories published in magazines, from December 1927. These earlier stories were collected in book form in The Thirteen Problems in 1932. (This summary is from Wikipedia.)