-New and exciting character classes and prestige classes
-Heaps of new skills, feats, spells, weapons and gear.
--Expansive details on magic amd the intricacies of mechanika
-Twelve major human ethnic groups of western Immoren
-Details on the various races: elves, dwarves, goblins, ogrun, trolkin, and more!
-The essentials on cosmology and religion.
To make full use of this book, you also need the D&D Player's Handbook and Dungeon and Dragon Master's Guide of 3.5.