From the back cover:
Is your Fu weak?
Does triple damage on a critical hit and a +1 dodge bonus to your Defense not 1uite match your vision of the martial arts expertise of Bruce Lee, Jacki Chan, Jet Li and Gordon Liu?
Then martial Arts Mayhem is for you! Written by d20 Modern Roleplaying Game designer Rich Redman, this book includes enough new feats, techniques, schools, and weapons to transform the Brawl, Combat Martial Arts, and Defensive Martial Arts feats into a dizzying array of combat options!
Your heroes can become brutal masters of the Bare-knuckle Brawling Schnook, master marital arts weaponry as students of Kobujutsu, or confuse and bewilder opponents as masters of Drunken Fighting.