Triangle

From Author Wars - https://authorwars.com/publications/triangle-176961.html

Overview:

Title: Triangle
Author: Isaac Asimov
Year: 1961
Publisher: Doubleday / SFBC
Price: $1.20
Pages: 516
Binding: Hardcover
Type: Omnibus
Title Reference: The Currents of Space
Notes: "Code C13 on page 516 of both the trade and SFBC issues. Both produced from the same print run, but the BCE was released as a May 1961 selection while the trade issue was published 2 June." - Currey