From publisher blurb:
This book was written for Players and Game Masters as a supplement to the core rules of Odysseys and Overlords Player’s Guide. Material presented in this book is to help Players and Game Masters build on the foundations already created for the world of Odysseys and Overlords with advanced rules for classes, new equipment, additional spells and optional rules for gameplay.
Odysseys & Overlords Advanced Tools contains:
Setting details and a list of the gods for use with Odysseys & Overlords
Advanced options for six playable Genera: Abyss-kissed, Centaur, Human, Orc, Spellscorched, and Wild folk
Advanced options for six playable classes: Bard, Cleric, Druid, Fighter, Magic-User and Thief
16 spells, including cantrips and orisons
Languages for use in the world of Odysseys & Overlords