From the back cover:
ENTER THE WORLD OF OUTCASTS
Most of those who dwell in Rokugan believe the Celestial Order to be absolute. Individuals who don't fit neatly into the grand design of the divine hierarchy are considered heretics, renegades, and outcasts. From the masterless rōnin who wander the Emerald Empire adrift to outsider gaijin who hail from lands afar, the domain of the Great Clans are home to many who walk a different path.
Path of Waves explores stories of heroic struggle, camaraderie, redemption, and revenge. This supplement for the Legend of the Five Rings Roleplaying Game offers 256 pages of guidance, resources, and new content to help players and game masters craft tales of outcasts in the Emerald Empire and includes:
A new set of The Game of Twenty Questions that adds a myriad of new options to create rōnin, peasant, and gaijin characters!
Adventure seeds, NPC profiles, and two fully-realized setting to hlep GMs bring the world of Rokugan to life for those on the lowest rung of society.
Information on the distant Ivory Kingdoms, including new rules for summoning the celestial implements of the gods.