- Past, Present, And Future, Prometheus Books, 1987 Water, Water, Everywhere, Mar-Apr-78, The Science Fictional Solar System
- Life And Time, Avon/Discus, Dec-79 - Life And Time, Doubleday, 1978 Water, Water, Everywhere-, Dec-65, The Magazine of Fantasy and Science Fiction
- Asimov On Numbers, Doubleday, 1977 - Asimov On Numbers, Bell Publishing, 1982 - Asimov On Numbers, Pocket Books, 1983 - Asimov On Numbers, Pocket Books, Oct-78 - From Earth To Heaven, Doubleday, 1966 - From Earth To Heaven, Avon, - From Earth To Heaven, Avon/Discus, 1972 We Were the First that Ever Burst -, Jun-78, The Magazine of Fantasy and Science Fiction
- The Road To Infinity, Avon/Discus, Feb-81 - The Road To Infinity, Doubleday, 1979 We, the In-Betweens, May-61, Science Fiction Writers of America Bulletin
- Is Anyone There?, Ace, 1967 - Is Anyone There?, Doubleday, 1967 - Is Anyone There?, Ace, 1970 Welcome, Stranger!, 1988, The Tyrannasaurus Prescription (collection #37)
- Asimov On Chemistry, Anchor, 1975 - Asimov On Chemistry, Anchor, 1975 - Asimov On Chemistry, Doubleday, 1974 What Are Little Stars Made of?, Dec-89, The Magazine of Fantasy and Science Fiction
- The Secret Of The Universe, Doubleday, 1991 - The Secret Of The Universe, Pinnacle, Nov-92 What Can We Expect of the Moon?, Mar-65, TV Guide
- Is Anyone There?, Ace, 1967 - Is Anyone There?, Doubleday, 1967 - Is Anyone There?, Ace, 1970 What Truck?, Aug-83, The Magazine of Fantasy and Science Fiction
- The Subatomic Monster, Doubleday, 1985 - The Subatomic Monster, NAL/Mentor, Nov-86 What Writers Go Through, 21-Dec-81, Isaac Asimov's Science Fiction Magazine
- Gold, Harper Prism, Mar-95 What's Fueling the Popular Science Explosion?, Aug-80, 100 Great Science Fiction Short Short Stories
- The Roving Mind, Prometheus Books, 1983 - The Roving Mind, Prometheus Books, 1983 What's Hiding on the Moons of Jupiter?, 7-Apr-74, National Wildlife
- The Beginning And The End, Doubleday, 1977 - The Beginning And The End, Pocket Books, 1983 - The Beginning And The End, Pocket Books, Dec-78 What's On Your Mind, May-72, National Wildlife
- Life And Time, Avon/Discus, Dec-79 - Life And Time, Doubleday, 1978 What's the Universe Made Of?, Apr-80, Science Digest
- Past, Present, And Future, Prometheus Books, 1987 When fantasy became Fantasy, ,
- Magic: The Final Fantasy Collection, Harper Prism, Jan-96 Where All the Sky is Sunshine, Sep-83, The Magazine of Fantasy and Science Fiction
- The Subatomic Monster, Doubleday, 1985 - The Subatomic Monster, NAL/Mentor, Nov-86 Where is Everybody?, 15-Dec-87, American Way Magazine
- The Road To Infinity, Avon/Discus, Feb-81 - The Road To Infinity, Doubleday, 1979 Why I Love Sherlock Holmes, 2-Sep-84, The Humanist
- Past, Present, And Future, Prometheus Books, 1987 Why I Wouldn't Have Done it This Way, 16-Jan-65, Diner's Club Magazine
- Is Anyone There?, Ace, 1967 - Is Anyone There?, Doubleday, 1967 - Is Anyone There?, Ace, 1970 Wings for America, Jul-86, Penthouse Magazine
- Past, Present, And Future, Prometheus Books, 1987 Wishing Will Make it So, Nov-86, Newsday
- Issac Asimov's Magical Words of Fantasy #7 : Magical Wishes, NAL/Signet, Nov-86 Women and Science Fiction, Jan-83, Isaac Asimov's Science Fiction Magazine
- Gold, Harper Prism, Mar-95 Wonderful World of Computers, 16-Apr-78, New Jersey Monthly
- The Roving Mind, Prometheus Books, 1983 - The Roving Mind, Prometheus Books, 1983 Worlds in Confusion, Oct-69, The Magazine of Fantasy and Science Fiction
- The Stars In Their Courses, Doubleday, 1971 - The Stars In Their Courses, Ace, Jul-72 - The Stars In Their Courses, Ace, 1976 Worlds in Order, Apr-90, The Magazine of Fantasy and Science Fiction
- The Secret Of The Universe, Doubleday, 1991 - The Secret Of The Universe, Pinnacle, Nov-92 Write, Write, Write, May-Jun-83, Video Review
- Past, Present, And Future, Prometheus Books, 1987 Writing For Young People, Jul-86, Isaac Asimov's Science Fiction Magazine
- Gold, Harper Prism, Mar-95
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