Purgatory by Darryl Olsen

He may have made a few wrong decisions in his life, but the last thing veteran Harry Taylor expects after closing his eyes for the last time is to wake up in a foreign landscape filled with the horrors of his worst nightmare. A place like no other, welcome to Purgatory. Formed at the beginning of time, Purgatory is a place where all the wrongs of the physical world have gathered, and a place filled with terror and controlled by an ancient and ruthless group of warriors called Leviathan. Can Harry survive these warriors hellbent on capturing and enslaving all those before them? One thing’s certain, if Harry is to survive, he’d better start forming alliances with the other damned souls trapped here. But can anyone be trusted in Purgatory?