They're gonna be a trilogy(assuming I ever get them printed).
The monster book is for my First Age of Man setting; similar to Monsternomicon, it's meant to be both useful for those not running my world and a teaser for my world to generate interest.
Then would come the Alternate Player's Guide, which details the races and classes available in my world; there's a mixture of Arcana Unearthed classes and a few PHB classes, plus rules, additional types of Totem Warriors, and the Spirit Warriors, a replacement for the Champion, which I don't much care for(although the name's probably gonna change).
Then comes the setting book; it details a lot about the First Age of Man, the aftereffects of the War of Immortals that caused the gods to create the mortal races and give them the world, and the like; this one is the last so that plenty of hype can be built up around it and also because it's a lot of fluff.