OPUS 300. Boston: Houghton Mifflin Company, 1984. Octavo, cloth-backed boards. First edition. Asimov's 300th book, containing a cross section of his writings: science, mystery, science fiction, the humanities and autobiography. A fine copy in nearly fine dust jacket with mild rubbing to spine ends and along bottom edges and tiny closed tears at upper edge of front panel and bottom edge of rear panel. (#126235).