Grumbles from the Grave

From Author Wars - https://authorwars.com/publications/grumbles-from-the-grave-16104.html

Overview:

Title: Grumbles from the Grave
Author: Robert A. Heinlein
Year: 1990
ISBN-10: 0345369416
Publisher: Del Rey / Ballantine
Price: $5.95
Pages: 325
Binding: Paperback
Type: Non-fiction
Title Reference: Grumbles from the Grave
Notes:
"First Mass Market Edition: December 1990"; no number line Edited by Virginia Heinlein. Cover art credit derived from credit for hardcover edition; cover is also 'signed'