Role-Playing Mastery

From Author Wars - https://authorwars.com/books/role-playing-mastery-3090191.html

Overview:

Title: Role-Playing Mastery
Author: Gary Gygax
Year: 1987
Type: Non-fiction

Editions/Publications:

Unknown. Role-Playing Mastery (Unknown, Gary Gygax, Perigee Books, ISBN-10: 0399512934, 176 pages, Trade Paperback, Non-fiction)