Green Knight

I wouldn't mind checking out a supplement that has Hero System stats for the likes of Thor, Ra, and Athena. So is there such a supplement? If so, could someone point me towards it? Thanks.

I know jack squat about the game world, but I'm interested in finding out more. So what's the deal with it? I.E.... 1) What races are in it? 2) What're the nations, and what's their character? 3) Do you make characters from scratch, or do they have something akin to classes from D&D? As in "You buy this point package in order to be a Wizard". Something like that? Appreciate any and all help in this, as I'm debating on whether I should buy it or not.