Expansion rules for the D&D Basic, Expert, and Companion Sets

This is set #4. To be able to play the Master Rules, You should already have played D&D Basic, Expert, and Companion Rules.

Master Player' Book - Featuring rules for new weapons, weapon masteries, and sieges. Also includes more advanced rules and spells for your master characters.

Master DM's Book - New rules for anti-magic effects, mystics, artifacts, and campaigning. Plus new treasures and monsters, including createures from other planes.