The Memoirs of Auberon of Faerie (1997)

From the back cover:

Creatures of Passion and Power . . .

Helpful Brownies, playful Pixies, sensuous Niaads, and even frightening Bogeys and Haunts. These are the Faerie - a beautiful, magical and occasionally terrifying part of the sorcerous near-earth of Castle Falkenstein. Now Auberon, High Lord of the Seelie Court, reveals the long-hidden origins and nature of the enigmatic Faerie, along the way illuminating many secrets both strange and surprising concerning the different Faerie breeds and their relationships with Humankind. His tale is one of wonder and horror a-mixed, certain to change your perceptions of the "Fair Folk" forever.

Because (as in all things Falkenstein) if you think you know the truth - you're probably wrong.

The Memoirs of Auberon of Faerie includes the following:

* The History and True Origins of Faeriekind, as well as the worlds they have visited in their travels.
* Greatly expanded rules for the use of Faerie Dramatic Characters in the Castle Falkenstein Game.
* A Field Guide to Faerie which describes the habits and nature of the various Faerie breeds and provides rules for their use in the Great Game.
* And more.

So sit down, pour a brandy, and enjoy . . .