This product is indispensable in running and developing my OD&D campaign. It includes rules, charts and guidelines from many of Judge's Guilds products all at my fingertips. I recommend it highly to anyone interested in playing the very first edition of the worlds most popular role playing game, especially if you intend to use the "Wilderlands" campaign settings.
Ah... This was my first Dungeon Master's Guide back in the day before there was an official Dungeon Master's Guide. Tons of useful charts, generators and inspiration in this little treasure. If you're playing OD&D or Basic D&D (Holmes or Moldvay) you should be able to drop this material right into your game with no problems. This is about as Old School as you can get but definitely worth the price as it contains most of the generators and information that was gleaned from other Judges Guild products...
The scan is excellent and the product is complete.
A nice supplement to any OD&D game. Encounter charts in many different environments. The complete list and stats of all the monsters from the various OD&D sources of the 70's is worth the price by itself.