From the release:
Wading through the mire of mist-shrouded swamps, dwelling in the shadows of ancient ruins, and lurking in the primeval wilderness just beyond the edge of mankind’s domain, the reptilian Lizardfolk are a cold-blooded reminder of the fragility of civilization. Hidebound and distrustful of the ways of settled races, the Lizardfolk maintain ancient traditions and practice a culture as brutal as it is timeless.
This title contains guidelines for playing Lizardfolk as characters and includes details on physical appearance, society, relations with other races, alignment and religion, and typical adventures; alternate racial traits and a new racial archetype, the Dragon Priest; and equipment, including the dragonflight boomerang, macana, grandfather scales, saurian shield, and stalker paste.
This mini-sourcebook has been specifically designed for use with the Pathfinder Roleplaying Game but can be used with any OGL-based game pretty much as-is and easily adapted to any related or successor systems.