The list of past Mystery Authors was too long so it had to be split in two. Authors whose last names begin with M - Z are here. Authors whose names start A - L are here:
http://www.eaforums.com/showthread.php?threadid=3248
M - Z:
Guy de Maupassant (picked by quasar, #61)
Anne McCaffrey (picked by joubert, #29)
Sharyn McCrumb (picked by AuntieEmma, #73)
Samuel Eliot Morison (picked by CurtisEdmonds, #104)
Alice Munro (picked by Grouch, #7)
Iris Murdoch (picked by hadassahchana, #69)
Ogden Nash (picked by quasar, #98)
Pablo Neruda (picked by phoenixx, #57)
Edith Nesbit (picked by quasar, #71)
Peggy Noonan (picked by CurtisEdmonds, #109)
Donald A. Norman (picked by theeye, #56)
Frank Norris (picked by murasaki, #58)
Cynthia Ozick (picked by theeye, #79)
Patricia Polacco (picked by ms_n, #33)
Pier Paolo Pasolini (picked by jankp, #15)
Beatrix Potter (picked by MrsNormanMaine, #25)
Ellery Queen (pseudonym for Frederic Dannay and Manfred B. Lee) picked by hymie, #27
Anna Quindlen (picked by theeye, #107)
Ayn Rand (picked by hymie, #35)
Arundhati Roy (picked by hadassahchana, #8)
Bertrand Russell (picked by theeye, #36)
Oliver Sachs (picked by theeye, #77)
Edna St. Vincent Millay (picked by theeye, #20)
John Saul (picked, shamefully by her own admission, by amykhar, #24)
Dorothy Sayers (picked by Redlass, #82)
Karl Shapiro (picked by quasar, #65)
George Bernard Shaw (picked by theeye, #43)
Mary Shelley (picked by murasaki, #85)
Sir Philip Sidney (picked by murasaki, #40)
Upton Sinclair (picked by quasar, #90)
Jane Smiley (picked by soxfan, #30)
Betty Smith (picked by jennifer_gibbons, #47)
Stevie Smith (picked by quasar, #37)
Sophocles (picked by Redlass, #55)
Dr. Benjamin Spock (picked by theeye, #99)
Danielle Steele (picked by AuntieEmma, #70)
Cat Stevens (aka Yusef Islam; also aka Demetre Georgiou) picked by Santa Claus, #17
Sydney Taylor (picked by quasar, #78)
James Thurber (picked by theeye, #64)
Mark Twain (picked by hypotenuse, #16)
Jules Verne (picked by quasar, #105)
Kurt Vonnegut (picked by drmomentum, #108)
Bill Watterson (picked by CurtisEdmonds, #89)
Fay Weldon (picked by theeye, #68)
Edith Wharton (picked by Grouch, #9)
Elie Wiesel (picked by hadassahchana, #5)
Oscar Wilde (picked by theeye, #41)
P. G. Wodehouse (picked by hadassachana, #26)
Naomi Wolf (picked by murasaki, #91)
Virginia Woolf (picked by AuntieEmma, #95)