From their Kickstarter page:
Aihrde is a complete campaign and world setting for your favorite RPG. Whether your playing Castles & Crusades, Dungeon Crawl Classics or any other RPG, you can find a home in Aihrde. There is an in-depth history, mythology, descriptions of all the races of the world, from dwarves to giants and elves to orcs, a case by case study of all the relevant kingdoms and peoples and the geographical regions they live. It also includes deities and all the relevant info needed to run them: guilds, orders, significant terrain features and so very much more. Aihrde is the most complete campaign setting on the market today.Now, at this point the book is funded, and that is left in the last couple of weeks is to reach a few of the stretch goals. Troll Lord Games is really good about getting their Kickstartered stuff together and out the door. Even if you don't play Castles & Crusades, you should be able to find plenty of interesting material for your fantasy campaigns, old or new school. If you haven't already, you should check this project out.
Why do I think that you should do this? Well, if having a world built for you isn't enough, I'll boil it down to one simple word: maps. The maps for this are just incredible looking and are suitable for framing as well. As a GM who can be lazy at times, I can say that it does always help to have premade worlds and cities and locations at your fingertips.
