Janet Asimov (born August 6, 1926 in Ashland, Pennsylvania) is an American science fiction writer, psychiatrist, and a psychoanalyst.
Born Janet Opal Jeppson, she started writing children's science fiction under the name J O Jeppson in the 1970s. She was married to Isaac Asimov from 1973 until his death in 1992, and they collaborated on a number of science fiction books aimed at young readers, including the Norby series.
Jeppson earned a B.A. degree from Stanford University (first attending Wellesley College), her M.D. degree from New York University Medical School, completing a residency in psychiatry at Bellevue Hospital. In 1960, she graduated from the William Alanson White Institute of Psychoanalysis, where she continued to work until 1986.
Janet Asimov's first published writing was a “mystery short” sold to Hans Stefan Santesson for The Saint Mystery Magazine and appearing in the May 1966 issue. According to Isaac Asimov, Janet Asimov's books that were written in association with him were 90 percent Janet's, and his name was wanted on the books by the publisher “for the betterment of sales”.