What is Nightmarescape and why is there a book about it?

Since I have the space, I'll go a little more in depth here about the Nightmarescape and the story since I've just been tossing out blurbs here and there.

-First of all, what is this Nightmarescape I keep talking about and have named a book after?
  It is the world in which my series of books will take place. It is entirely constituted of psychic residue and is sustained by emotions such as grief, fear, and anger. It has been around as long as humanity has, reaching out to people who have suffered in their nightmares. Once it reaches someone, it will continually manifest in their nightmares until they die and are reborn there. Consequently, people from all over human history populate the Nightmarescape. This has led to many rivaling factions as well as syncretism of thoughts and adoptions of technologies that would not have existed in our own reality.
In appearance, the entire world is black, white, and shades of gray. Everything appears dead and run down. Those who come to populate this dread realm are undead mockeries of their former selves. The only actual colors are blue or red lights that burn in the empty eye sockets of some of the world's residents. Picture a Stephen Gammell illustration from Scary Stories to Tell in the Dark, but less abstract and you're pretty much there...Now take one of the undead residents, reach back into history and equip that ghoul with armor and weapons from different time periods.

-What is the significance of the characters having eyes or empty eye sockets with lights in them?
  Those who die and have some semblance of humanity will remanifest in the Nightmarescape with empty eye sockets illuminated by intense blue lights. This is not necessarily to say that they are "good people" but they still have a lot of human emotions that drive them.
   The red light indicates that the individual has given themselves over to one single desire or aspect of existence. This can include blind emotions such as rage, hatred, domination, or any other host of usually destructive desires.
    Some presences lack eyes altogether and display only empty eye sockets. These poor souls were mindless when they died. They have little to no thinking brain left, only enough to know that they are suffering. The most common of these is displayed among the plague afflicted that Pastor Nox controls.
    Lastly, those who still have eyes are usually crazy as hell.

-What happens when a new presence comes to the Nightmarescape?
   Basically what Curse endures in the book. They wake up unable to recall anything about their former life at first. This knowledge is revealed to them in time through flashbacks. Some are able to use their old lives to start new identities, others become depressed and angry because of the lives they have lost. It all depends on the person and what they are able to remember.

That'll get you started. More to come later.