From the back cover:
Trapped between harsh mountains and turbulent seas, the Hermetic Tribunal of Iberia is fated, nay, condemned, to isolation. Here, on the Spanish penninsula, the Order of Hermes has established itself amongst a resolute people who struggle against their imprisonment and against savage invaders who seek to conquer what little they have. Even Iberia's Magi contribute to her wars, fighting amongst themselves for magic, territory, and revenge. Here, in this bleak, war-torn land, you may find your destiny or your doom.
The Tribunals of Hermes: Iberia(TM) is the first in a series of Ars Magica Third Edition(TM) setting supplements. This book provides extensive background into both the mundane and magical realms of Mythic Europe's Spanish peninsula. Not only do you get everything you need to tell stories here, but you may choose from several fully developed Covenants, or may create your own home on this desperate, forlorn coast.