'X' Stands for Unknown
| First published | 1986 |
|---|---|
| Publisher | Grafton |
| Format | Paperback |
| Type | Nonfiction |
| Cover art | Chris Foss |
| Pages | 270 |
| Price | £2.95 |
| ISBN | 0586058427 |
"Published by Grafton Books 1986 First published in Great Britain by Granada Publishing 1985" No number line. "Front cover illustration by Chris Foss" on the back cover NEW ZEALAND $11.95 AUSTRALIA $7.95
| Page | Title | Author(s) | Type |
|---|---|---|---|
| 9 | Introduction (X Stands for Unknown) | Isaac Asimov | Essay |
| 15 | Read Out Your Good Book in Verse | Isaac Asimov | Essay |
| 29 | Four Hundred Octaves | Isaac Asimov | Essay |
| 43 | The Three Who Died Too Soon | Isaac Asimov | Essay |
| 57 | X Stands for Unknown | Isaac Asimov | Essay |
| 87 | Bread and Stone | Isaac Asimov | Essay |
| 101 | A Difference of an "E" | Isaac Asimov | Essay |
| 116 | Silicon Life After All | Isaac Asimov | Essay |
| 133 | The Long Ellipse | Isaac Asimov | Essay |
| 147 | Change of Time and State | Isaac Asimov | Essay |
| 163 | Whatzisname's Orbit | Isaac Asimov | Essay |
| 177 | Ready and Waiting | Isaac Asimov | Essay |
| 192 | Dead Centre | Isaac Asimov | Essay |
| 206 | Out in the Boondocks | Isaac Asimov | Essay |
| 223 | To Ungild Refined Gold | Isaac Asimov | Essay |
| 241 | The Circle of the Earth | Isaac Asimov | Essay |
| 257 | The Armies of the Night | Isaac Asimov | Essay |