Staffel of Invisible Men
From Author Wars - https://authorwars.com/books/staffel-of-invisible-men-1535499.html
Overview:
- Title: Staffel of Invisible Men
- Author: Robert J. Hogan
- Year: 1935
- Type: Novels
- Series: G-8
- Number in Series: 26
From Author Wars - https://authorwars.com/books/staffel-of-invisible-men-1535499.html