“Need it be said – the little grey cells solve once more the seemingly insoluble. Mrs Christie makes an improbable tale very real, and keeps her readers enthralled and guessing to the end.” Times Literary Supplement

“A brilliantly ingenious story.” Dorothy L. Sayers, Daily Herald

“Ingenuity at its height … the idea is utterly novel, the setting a model of realism, and the characters a versatile, attractive crew.” Woman’s Journal

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