If you haven't read it, then you'd be missing a lot if you didn't read [[Vengeance: The Tainted Realm: Book 1 by Ian Irvine]]. If you're already a fan, then you may also enjoy [[Promise of Blood (Powder Mage Trilogy) by Brian McClellan]] or, if you like your epic fantasy even darker, try [[The Grim Company by Luke Scull]].