It's no mystery that she was born in 1890 in Devon, England, wrote 67 novels under this name & 6 as Mary Westmacott
Pen name, Mary Westmacott ... She also 
wrote the world's longest-running play, a murder mystery, The Mousetrap, and... [DOC] [TLE] Agatha Christie - Author, Playwright - Biography.com [PAR] Sep 15, 2015 ... Famed mystery writer Agatha Christie was one of the top-selling ... of Mystery": "
Queen of Crime"; Maiden Name: Agatha Mary Clarissa ...