Affinity tomes contain detailed reports and information father by magi over the years pertaining to a specific affinity. With the exception of the General affinity tome, they will, when read, give you a 10% boost to that specific affinity, while simultaneously reducing your progress in all other affinities.
Affinity Tome: Air is an item from the Ars Magica 2 mod. It grants the player a 20% increase in the Air Affinity and cause a 5% or 10% decrease in the other Affinities.
The tome cannot be crafted but can be found in dungeons generated by Better Dungeons.