Land of Demons: A New Age Dawns - Land of Demons, #1

The greatest inventor of the era has fallen to madness. Now calling himself the Baron, he creates terrible tools and devices of war for the Olympian Empire. With the empire's weapons making swords, shields, and even magic obsolete, all of Aethora and the world of Kelndroarn will be enslaved or destroyed. The only hope for ending this chaos rests in the hands of a group of rangers, all infamous for their past exploits as witch hunters.
Now, blackmailed into service, they're tasked with hunting and killing the mad Baron, and stopping his advantage for the enemy. But it will not be easy, with the rangers' exploits having spread far and wide, they have made themselves a threat. And all threats to the empire will be hunted down.