If a horror book could be said to be liminal, Unworld definitely qualifies. (Liminal is defined as occupying a position at, or on both sides of, a boundary or threshold.) It definitely put me in mind of Neverwhere by Neil Gaiman. Don't get me wrong, they are two very different books, but Unworld definitely has that vibe. It's full of empty, eerie, vaguely unsettling landscapes with a very cool story at the core. Give this one a try if you like adventurous, eerie horror fantasy. 4.5 stars