The 9th Fortress

Detective Daniel Fox has just met with a grizzly end. The dawn of his afterlife is where our story begins.
To redeem his soul and earn a place in Heaven, Daniel must first venture to the 9th Fortress: Lucifer’s primary prison in the heart of hell-fire. There the worst of the worst are contained, and Daniel’s mission is to save one particular soul from its dungeon.
To help him achieve that almighty feat, the detective was given a defender--a samurai warrior called Kat--the most dangerous man who ever lived and the only one qualified, and capable of leading this perilous expedition.
Together, the Kat and Fox encounter the unnatural and supernatural on their decent to the pit, and all of it trying to stop them.