The fiercest surprises often come from the most familiar foes! Just as no single class description can define every fighter, rogue, or wizard, no single creature entry can truly cover every vicious champion, unholy priest, or savage sorcerer in a band of organized and intelligent monsters. With Pathfinder Roleplaying Game: Monster Codex, fleshed-out hordes are at your fingertips! This volume presents a trove of entries for 20 classic monster races, giving you new ways to use your favorite monsters in a variety of encounters and challenge levels.