Compare Publications for The 13th Immortal / This Fortress World

You are not logged in. If you create a free account and sign in, you will be able to customize what is displayed.

• Log In
• Help Navigating

• Home Page
• ISFDB Wiki
• ISFDB FAQ
• SF Calendar
• Author Directory
• Award Directory
• Publisher Directory
• Magazine Directory
• Statistics/Top Lists
• Recent Activity
• Cleanup Reports

• Edit Title Data
• Compare Publications
• Delete This Title
• Make This Title a Variant
• Add a Variant to This Title
• Add an Award to This Title
• Unmerge Titles
• Check for Duplicate Titles

• Add New Anthology
• Add New Chapbook
• Add New Collection
• Add New Fanzine
• Add New Magazine
• Add New Nonfiction
• Add New Novel
• Add New Omnibus
• Add Untitled Award

• Disclaimer
• Privacy Policy
• Banner Art Credits

Title: The 13th Immortal / This Fortress World
Authors: James E. Gunn and Robert Silverberg
Date: 1957-00-00
Type: OMNIBUS

Select publications to compare:

	Title	Date	Author/Editor	Publisher/Pub. Series	ISBN/Catalog ID	Price	Pages	Format	Type	Cover Artist	Verif
	The 13th Immortal / This Fortress World	1957-00-00	James E. Gunn, Robert Silverberg	Ace Books (Ace Double #D-223)	D-223	$0.35?$: US dollar	129+ 190	dos?Dos-a-dos or tete-beche formatted paperback books, such as Ace Doubles and Capra Press back-to-back books.	omni	Ed Emshwiller , Ed Valigursky

---

Copyright © 1995-2022 Al von Ruff and the ISFDB team
ISFDB Engine - Version 4.00 (2006-04-24)