From the back of the book:
Enemies & Allies is the core sourcebook for creatures and characters in Modern AGE. 45 entries describe possible friends, foes, and contacts from the urban fantasy, horror, technothriller, crime drama, and near future SF genres. Find a hidden Gargoyle, investigate the trail of destruction left by Experiment #12, or battle the relentless Bioroid Assassin. Each entry includes a detailed description, story hooks, and game statistics for Gritty, Pulpy, and Cinematic campaigns.
Dedicated chapters for each genre include special rules to help your game evoke the themes behind them. Furthermore, appendices include rules for common animals, building your own adversaries and other NPCs, and for adapting creatures from other Adventure Game Engine games such as Fantasy AGE to Modern AGE. Find your enemies and allies within!