Star Trek (boxed set)

From Author Wars - https://authorwars.com/publications/star-trek-boxed-set-32598.html

Overview:

Title: Star Trek (boxed set)
Author: Howard Weinstein, Vonda N. McIntyre, A. C. Crispin, Jean Lorrah
Year: 1991
ISBN-10: 0671963686
Publisher: Pocket Books
Price: $18.00
Binding: Paperback
Type: Omnibus
Title Reference: The Entropy Effect
Notes:
A four paperback boxed set. ISBN is for the box