The series The Broken empire consists of three books written by Mark Lawrence. They are in order; Prince of Thorns, King of Thorns and Emperor of Thorns. The main character is Jorg Ancrath, an anti hero in pursuit to take over all the kingdoms in his world.
It's set in a post apocalyptic world where today's humans are called " the builders"
"Excellent- on par with George R.R Martin"- Conn Iggulden