From the introduction:
Well, folks, here we are! This one has been a long time coming. The last Age of Conan sourcebook was originally released all the way back in 2009. Since then, my ongoing campaign set in the world has gone through many shifts, evolutions and iterations, and it was time to put those into print for folks who want to see where things are going. I've also been promising a bestiary for quite some time, and this work includes a wealth of new monsters for your D&D Conan games.
In here you'll also find new combat rules, including a change to the Chainmail combat system that eliminates the need to check tables for each attack, rules for using the miniatures and battle boards from the Monolith Conan boardgame with your RPG games, new rules for sorcery and summoning (partially adapted from the Mongoose Conan game), and more. I think this provides just as much utility across the board as my last two did, and I hope you enjoy it.