Murder, sunny side up

Emma Lathen was the pen name of two American businesswomen: an economist Mary Jane Latsis (July 12, 1927 – October 29, 1997) and an attorney Martha Henissart (born 1929), who received her B.A. in physics from Mount Holyoke College in 1950 (Wikipedia). They also wrote under the pen name R. B. Dominic.