214pp. Dust jacket in very good condition, shelf wear on spine. Inscribed by Isaac Asimov: “To Neil + Josleen Felshman who suggested “Which is Which?” with thanks / Isaac Asimov / 19 January 1986.”
Comments: Isaac Asimov was a prolific writer of Science Fiction and Popular Science. He is considered one of the “Big Three” science fiction writers of the 20th Century, including Arthur C. Clark and Robert Heinlein. He wrote over 500 books during his lifetime. He passed away in 1992 in Brooklyn, New York.