The Castle Guide (DMGR2), softback supplement for AD&D 2nd/2.5th ed.
“Imagine a world of knights in shining armor, mighty castles, and high chivalry. In this book, you’ll find a wealth of information desgined to allow any DM to create a campaign world based on feudal Europe. Sections address life in a feudal culture, new Battlesystem rules for the resolution of sieges, a quick resolution system for massive military campaigns, and an assortment of generic castles to spark your imagination. The Castle Guide is a must for any player or DM who’s ever wanted to fight for a seat at the round table.”