Broken Mage — D.W. Jackson

Trapped in the vast underground networks of the subterranean Thad tries to find his way back to the surface. The trouble is Thad is not the only thing that lurks in the darkness. Creatures he had only heard about in tales appear around every bend. forced to fight for his life Thad is no longer living but merely surviving. He tries to keep his hopes up with his only link to the outside world, a small box that allows a small amount of food and news to be sent to him every few days.