The Throne of Darkness — Sam Ferguson

When millionaire Tobin Masters decided to kill himself, he never imagined that not only would he survive, but he would find himself transported to the dimension of Hell. Enslaved by the living artifact known as the Throne of Darkness, Tobin is forced to become the Observer, to record the events of the War of Ascension as seven terrible demon Lords/Ladies tear the world apart in their bid to become the next Ruling Satan. However, this War of Ascension is unlike any that has come before it. The free humans, people who barely survive on the fringes of Demonic Society, have gotten their hands on a stone of power. A chance to put one of their own on the Throne and send humans back home. The stage is set, the war has begun, and God help whoever wins.