Unknown Worlds, October 1943
| Book | The Book of Ptath |
| Editor | John W. Campbell, Jr. |
| Associate Editor | Catherine Tarrant |
| Publisher | Street And Smith Publications, Inc. |
| Periodical Title | Unknown / Unknown Worlds |
| Copyright Holder | Street And Smith Publications, Inc. |
| Contributing Writer | A. E. van Vogt, Jane Rice, E. Mayne Hull, Chester S. Geier, Roby Wentz, Cleve Cartmill |
| Illustrator | Frank Kramer, Smith (3), A. Williams, Edd Cartier, Kolliker |
| Format | Pulp Magazine |
| Language | English |
| Location | New York, NY |
| Copyright | 1943 |
| Cover Date | 1943-10 |
| Pages / Font | 164 pages |
| Volume Number | VII |
| Issue Number | 3 |
| Chapters | NOVEL 9 • The Book of Ptath, by A. E. van Vogt SHORT STORIES 111 • The Refugee, by Jane Rice 121 • The Patient, by E. Mayne Hull 125 • Fido, by Chester S. Geier 135 • Change, by Roby Wentz 145 • Clean-Up, by Cleve Cartmill READERS' DEPARTMENTS 6 • Of Things Beyond 160 • —And Having Writ— |
| Notes | Pulp magazine. Final issue. |
Added by ThomasP64 · Last edited by westpier