X Stands for Unknown
Introduction '''''X Stands for Unknown''''' is a collection of seventeen nonfiction science essays written by Isaac Asimov. It was the seventeenth of a series of books collecting essays from ''The Magazine of Fantasy and Science Fiction'', these being first published between January 1982 and May 1983.It was first published by Doubleday & Company in 1984.
Contents *Physics**1 Read Out Your Good Book in Verse (May 1982)**2 Four Hundred Octaves (June 1982)**3 The Three Who Died Too Soon (July 1982)**4 X Stands for Unknown (August 1982)*Chemistry**5 Big Brother (September 1982)**6 Bread and Stone (October 1982)**7 A Difference of an 'E' (November 1982)**8 Silicon Life After All (December 1982)*Astronomy**9 The Long Ellipse (January 1982)**10 Change of Time and State (April 1982)**11 Whatzisname's Orbit (March 1982)**12 Ready and Waiting (February 1983)**13 Dead Centre (April 1983)**14 Out in the Boondocks (May 1983)*Mathematics**15 To Ungild Refinèd Gold (January 1983)**16 The Circle of the Earth (February 1982)**17 The Armies of the Night (March 1983)
Reception Dave Langford reviewed ''X Stands for Unknown'' for ''White Dwarf'' #79, and stated that "If you're scientifically literate you'll find the interesting bits buried in over-familiar stuff (though I always cheer Asimov when he stomps the crackpots). If not, you probably don't read books like this. That's showbiz."
Reviews *Review by Edward James (1985) in ''Paperback Inferno'', #55
References
External links * Asimovonline.com* 'X' Stands For Unknown at goodreads.com