The Big 4

From Author Wars - https://authorwars.com/books/the-big-4-1996538.html

Overview:

Title: The Big 4
Author: Agatha Christie
Year: 1961
Type: Novels

Editions/Publications:

Unknown. The Big 4 (Unknown, Agatha Christie, Avon, $0.35, 126 pages, Paperback, Novel)