The Christie Affair by Nina de Gramont

This is the second book that grapples with the mystery of what Agatha Christie did for the eleven days that she disappeared in 1926, shortly after her husband revealed his extra-marital affair, and before the public was aware of the impending divorce. On the winter evening of Dec. 3, 1926, Christie got into her car — a little green Morris Cowley that she’d bought with earnings from her early novels — and drove off from her house in the suburbs near London. She left behind her sleeping 7-year-old daughter, Rosalind, in the care of the maid. She also left her beloved little terrier, Peter, who habitually lay down beside her as she wrote. Christie was wearing a fur coat and hat and carried only an attaché case. For more than a week until she was discovered, ensconced in the Swan Hydropathic Hotel in Harrogate, Yorkshire, on Dec. 13, Agatha Christie was the object of one of the biggest missing-person searches in British history: police, bloodhounds, an army of volunteer searchers, fellow mystery novelists Dorothy L. Sayers and Arthur Conan Doyle, and even Archie Christie and the intrepid little Peter all joined in the search. Here is a somewhat far fetched hypothesis of what happened in between.