From the back of the book:
"In this noble, giant-rule land, explore the reaches of the Floating Forest. Discover the incomparable beauty of the magical Crystal Fields. Learn the secrets of the God-king of the Verrrik people. But beware the military might of the chorrim and the fiendish might of the shadow trolls.
The material in this exciting new sourcebook from 3rd edition codesigner Monte Cook builds on the rules in Arcana Unearthed. In theses pages you'll find:
8 new prestige classes
12 new monsters
Dozens of new magic items; and
A gazetteer of the Arcana Unearthed setting - the lands of the Diamond Throne."