The grudge between the Warring Kingdoms of Nostria and Andergast has burned for almost two millennia.

This regional sourcebook provides detailed background information on these hostile realms in northwestern Aventuria and their combative inhabitants. Encounter the hazards of the Forest Wilderness, the deadly Knifegrass Steppes in the east, and the rough coasts of the Lakelands. Uncover the hidden secrets of sumes (druids) and witches, and pit your heroes against new creatures such as dark marwolds and predatory giant dragonflies.

The Warring Kingdoms includes the following:
* 11 new regional professions, such as Andergastan Knights, Nostrian Dyke Builders, all-knowing Serpent Witches, and mysterious Druids
* A sample forest wilderness village that can be located anywhere in Nostria or Andergast
* Details on knightly traditions and royal tournaments
* New armor and weapons, including the famous two-handed Andergaster sword and the Nostrian longbow
* Focus rules for character traits to lend your hero a regional flair
* New special abilities, spells, rituals, and the enigmatic Elder Signs
* Mysteries and adventure hooks for use by the GM
* An A3-format region map, plus city maps of Andergast, Nostria, Joborn, Salza & Salzerhaven, and Teshkal