Devils of the Deep and The Headless Men
From Author Wars - https://authorwars.com/books/devils-of-the-deep-and-the-headless-men-1517088.html
Overview:
- Title: Devils of the Deep and The Headless Men
- Author: Harold A. Davis Alan Hathway
- Year: 1984
- Type: Omnibuses
- Series: Doc Savage doubles