Alien from Arcturus / Atom Curtain

From Author Wars - https://authorwars.com/publications/alien-from-arcturus--atom-curtain-1998.html

Overview:

Title: Alien from Arcturus / Atom Curtain
Author: Gordon R. Dickson, Nick Boddie Williams
Year: 1956
Publisher: Ace Books
Price: $0.35
Pages: 150+168
Binding: dos
Type: Omnibus
Title Reference: Alien from Arcturus
Notes:
- Cover for Alien From Arcturus is stated "Complete and Unabridged"
  - Cover artist is uncredited and signature is not visible on cover.
  - Alien From Arcturus 150 pages
- Cover for Atom Curtain is described as "A Novel"
  - Cover artist is uncredited and signature is not visible on cover. The ACE Image Library credits Valigursky.
  - Atom Curtain 168 pages