Basic Roleplaying Gamemaster Book (BRP)
This book is intended for gamemasters¸ though there is nothing contained herein¸ except for the Money Tree scenario information¸ that needs be kept from the players.
"There are five main sections to this book. The first discusses the duties of the gamemaster in devising and presenting roleplaying adventures. The second covers scenario-construction aids for the gamemaster including encounter tables¸ languages¸ treasures¸ and danger-classes. The third treats the social organization postulated in the Basic Roleplaying rules¸ particularly as they affect adventurer occupations¸ income¸ magic and so forth. The fourth explores ships and the sea; supplementary rules to use in your game. Finally¸ a ready-to-play scenario is presented¸ intended to be used with the average beginning adventurer group.