Isaac's Universe
Isaac's Universe is a collaborative fictional universe created by Isaac Asimov in 1990, as a shared setting to be used by his fellow science fiction writers.
The project was proposed by Asimov's friend Martin H. Greenberg, who edited three Avon collections of short stories in the setting between 1990 and 1992. Two DAW novels - by Hal Clement and Asimov's wife Janet Asimov -followed in 1993 and 1995.