City Under the Sea

From Author Wars - https://authorwars.com/publications/city-under-the-sea-232289.html

Overview:

Title: City Under the Sea
Author: Kenneth Bulmer
Year: 1961
Publisher: Digit Books
Price: 2/6
Pages: 159+[1]
Binding: Paperback
Type: Novel
Title Reference: City Under the Sea
Notes:
• "First UK publication" • "© by Ace Books Inc., 1957" is the only date; year taken from Tuck • The artist is not credited, the artwork is clearly signed