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The Thirteen Problems is a short story collection written by Agatha Christie and first published in the UK by Collins Crime Club in June 1932 and in the US by Dodd, Mead and Company in 1933 under the title The Tuesday Club Murders. The UK edition retailed at seven shillings and sixpence and the US edition at $2.00. …

The Under Dog and Other Stories is a short story collection written by Agatha Christie and first published in the US by Dodd, Mead and Company in 1951. The first edition retailed at $2.50. It contains works from the early days of Christie's career, all featuring Hercule Poirot. All the stories were published in …