Lonely Mountain Region Guide contains material previously released as Erebor The Lonely Mountain for The One Ring Roleplaying Game, fully converted to be compatible with Adventures in Middle-earth and the OGL rules.
- Rules for creating your own Dragons as well as a set of fearsome foes as examples
- New Dwarven artefacts and enchantments and the art of their making
- The long history of the war between Dwarves and Orcs and relics from that conflict
- Two playable cultures – expanded rules for Dwarves of the Iron Hills and the new Dwarves of the Grey Mountains
- A complete set of journey tables for the region and advice on trips within a city!