Agatha Christie disappeared for 10 days in 1926 after an argument with her husband, but was found under the name of Mrs. Tressa Neele in a hotel. image credit: Google

Edgar Allan Poe, inventor of detective fiction, was found in a semi-conscious state in Baltimore in 1849 and died shortly after. image credit: Google

Ambrose Bierce disappeared in 1913 while traveling to Mexico to gain first-hand experience of the Mexican Revolution and was last seen in Chihuahua, Mexico. image credit: Google

Ian Mackintosh , a British Navy officer and thriller writer, disappeared in 1979 while flying over the Gulf of Alaska. image credit: Google

Antoine de Saint-Exupéry, French aviator and author of "The Little Prince," disappeared during World War II while on a reconnaissance mission. image credit: Google

Yda Hillis Addis, a short story writer, escaped from an insane asylum in 1902 and disappeared forever. image credit: Google

Irmgard Keun, a German novelist, faked her own death and lived in exile in France or the Netherlands during World War II. image credit: Google

Agatha Christie is known as the "Queen of Crime" for her famous detective novels. image credit: Google