The Monsters Know What They're Doing: an RPG sourcebook for DMs who want to imbue monsters with deep, smart tactics

For years, Keith Ammann has maintained his blog, The Monsters Know What They're Doing, in which he carefully laid out the logical tactics that the monsters of Dungeons and Dragons would use in combat, based on their alignment, stats, and habitats, creating sophisticated advice for Dungeon Masters hoping to move their combat encounters from rote stab-stab-kill affairs into distinctive, memorable strategy-and-tactics affairs that created not just variety and challenges for players, but also depth and verisimilitude. Now, Ammann's work has been collected in the first of two planned volumes: The Monsters Know What They're Doing: Combat Tactics for Dungeon Masters is one of the most interesting, thoughtful, smart RPG sourcebooks I've ever read.