Dark Powers

From Author Wars - https://authorwars.com/books/dark-powers-188233.html

Overview:

Title: Dark Powers
Author: Jack McKinney
Year: 1988
Type: Novels

Editions/Publications:

Unknown. Dark Powers (Unknown, Jack McKinney, Del Rey / Ballantine, ISBN-10: 0345353013, $2.95, 233 pages, Paperback, Novel)
Unknown. The Sentinels (Unknown, Jack McKinney, Del Rey / Ballantine, ISBN-10: 0345389018, $5.99, 467 pages, Paperback, Omnibus)