Destination Unknown // So Many Steps to Death — Agatha Christie

Lovely red-haired Hilary Craven wanted to die. The sleeping pills were ready on her bedside table, when a knock sounded on the hotel-room door... .

With that knock, and the entrance of a cheerful, owlish young man, her plans for self-imposed death were dramatic-ally altered. After hearing the strange story of a disappearing scientist, Hilary agreed to take on another woman's identity--and a daring secret mission into the African desert--without the slightest chance of coming back alive!