Mama Day is the third novel by Gloria Naylor.
 The story, which makes many allusions to the dramatic works of Shakespeare, focuses upon the tragic love affair of "star-crossed" lovers Ophelia "Cocoa" Day and George Andrews.
 The setting of the novel is split between New York City, where George was born and raised and Ophelia has recently moved, and Willow Springs, a fictional community situated on a coastal island on the border of Georgia and South Carolina where Ophelia's family has lived for several generations.
 The novel takes place within the same fictional universe as some of Naylor's other novels, indicated through its passing references to events and characters from both "Linden Hills" and "Bailey's Cafe".
Linden Hills is a novel written by Gloria Naylor, originally published in 1985.
 Naylor bases her allegory on Dante's Inferno.
 The narrative is written from a third-person omniscient perspective, detailing different characters based on different traits that correspond with the different rings of Dante's interpretation of Hell.
 The novel is a revision of Naylor's Yale master’s thesis.
Brewster Place is an American drama series which aired on ABC in May 1990.
 The series was a spinoff of the 1989 miniseries "The Women of Brewster Place", which was based upon Gloria Naylor's novel of the same name.
 The series starred talk show host Oprah Winfrey, who also served as co-executive producer.
The Women of Brewster Place (1982) is the debut novel of American author Gloria Naylor.
 It won the National Book Award in category First Novel.
Norman Rush (born October 24, 1933, San Francisco, California) is an American writer whose introspective novels and short stories are set in Botswana in the 1980s.
The Women of Brewster Place is an American television miniseries that was broadcast on March 19 and 20, 1989 on ABC.
 The miniseries is based upon the critically acclaimed 1982 novel of the same name by Gloria Naylor.
 It was produced by Oprah Winfrey's Harpo Productions with a teleplay by Karen Hall.
Gloria Naylor (January 25, 1950 – September 28, 2016) was an American novelist, known for her book "The Women of Brewster Place".
Mating (1991) is a novel by American author Norman Rush.
 It is a first-person narrative by an unnamed American anthropology graduate student in Botswana around 1980.
 It focuses on her relationship with Nelson Denoon, a controversial American anthropologist who has founded an experimental matriarchal village in the Kalahari desert.
Sydney J. van Scyoc (born July 27, 1939) is an American science fiction writer.
 Her first published story was "Shatter the Wall" in "Galaxy" in 1962.
 She continued to write short stories throughout the 1960s and in 1971, published her first novel, "Saltflower".
 Other novels followed until 1992, when she abandoned writing to make and sell jewelry; she later returned to write science fiction.
Bailey's Café is a 1992 novel by award-winning American author Gloria Naylor.
 The novel consists of a loosely intertwined group of stories, all told in first person, about the owners and patrons of "Bailey's Cafe", an apparently supernatural establishment, set nominally in New York City, whose entrance can be found from different places and times.

Question: Did Gloria Naylor and Norman Rush both write short novels about 1980's Botswana?
Answer: no