It's no mystery that she was born in 1890 in Devon, England, wrote 67 novels under this name & 6 as Mary Westmacott
[DOC] [TLE] Agatha Christie - New World Encyclopedia [PAR] May 17, 2013 ... She also wrote romances under the name Mary Westmacott, but is ... Ackroyd, (
1935) a breakthrough novel for Christie due largely to its unusual plot twist.