From the back of the book:
Feared Warriors of the Arcane
Cold. Cunning. Masters of sword and spell. Such words describe the serpent-folk known as the asaatthi, yet still little is known of their ancient history, their rich culture, their once-influential role in the world and their plans for the future.
The second volume in the Vigil Watch series for the Scarred Lands, this sourcebook explores the mysterious asaatthi race -- their creation in the Epoch of Mormo, the rise and fall of their culture and their future goals. Also discover tips for using these serpent-folk in any d20 campaign, from the creatures' lairs and tactics to unique magic and prestige classes.