Two new stories about Hercule Poirot--one of Agatha Christie's most famous detectives--have been uncovered by a researcher.

According to Bookseller, the books were uncovered by John Curran, a Christie fan granted rare access to the late mystery writer's 73 writing notebooks. The stories will be published in the forthcoming volume, "Agatha Christie's Secret Notebooks: Fifty Years of Mysteries in the Making." The book is a £20 hardcover with a UK print-run of 20,000 and HarperCollins holds the world rights.

Here's more from the report: "Secret Notebooks will include short story 'The Mystery of the Dog's Ball,' which was eventually reworked into the novel 'Dumb Witness,' but unlike other Christie short stories-turned-­novels it remained unpublished. The other story 'The Capture of Cerberus,' was written to complete The Labours of Hercules, a collection which followed the 12 cases Poirot chose to end his career." (Image via.)