From publisher blurb:
If you are like many fantasy gamers, you've probably spent a small portion of your gaming budget here and there collecting plastic miniatures, and perhaps you've ended up with a number of figures for characters that aren't detailed in Swords & Wizardry or some other preferred retro-clone system. Maybe you are trying to convert modules or campaign settings from one of the latter editions of the "World's Most Popular Roleplaying System" into a simpler and potentially more elegant gaming system, and want to offer new racial options for characters in such a campaign. It might even be that you are seeking new and unusual racial character options to add spice and variety to your own homebrew setting. Whatever your reasons for wanting more Old School character races, the Book of Races intended to help you meet those needs and then some.
Welcome to the Book of Races. This supplement has been developed with the Swords & Wizardry rules system in mind, and should prove easy to use for both Referees and players alike. Other “retro-clone” rules systems may find the material useful with only minimal conversion efforts. This supplement is divided into two sections. The first section, New Races, describes a dozen new races for use in your fantasy campaigns. In this section, each race is described with game mechanics as suggested by the Swords & Wizardry Core Rules, which details fantasy races as a game mechanic separate from character classes. The second section, Racial Classes, provides specific racial classes for Referees that prefer their non-human characters to operate in a character class structure similar to Fighting Men, Clerics and Magic-Users.
The Book of Races details the Artathi, the Duar, the Elde, the Eldeblooded, the Feytouched, the Giantkin, the Goblin, the Hyrknoff, the Kelshan, the Ordath, the Vaelan and the Wyrmblooded. As an added bonus, an appendix detailing an alternate Simple D6 check system is included at the end of this supplement.