The Rim of the Unknown
| Cover Artist | Herb Arnold |
| Publisher | Arkham House |
| Copyright Holder | Frank Belknap Long |
| Format | Hardback |
| Language | English |
| Location | Sauk City, WI |
| Copyright | 1972 |
| Pages / Font | 291 pages / Garamond |
| Library of Congress Catalog Card Number | 72-88123 |
| Chapters | 3 • The Spiral Intelligence 21 • The World of Wulkins 48 • The Man with a Thousand Legs 69 • Humpty Dumpty Had a Great Fall 92 • Guest in the House 108 • The Trap 119 • Fuzzy Head 132 • The House of Rising Winds 148 • Mr. Caxton Draws a Martian Bird 159 • The Critters 170 • The Cottage 182 • The Man from Time 194 • Cones 210 • Preview 212 • Lesson in Survival 218 • Good to Be a Martian 223 • Filch 237 • Little Men of Space 252 • The Spectacles 254 • Man of Distinction 261 • The Great Cold 275 • Green Glory 285 • The Last Men |
| Notes | Three thousand five hundred copies printed by The Collegiate Press, George Banta Company, Inc., Menasha, Wisconsin. |
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