This cbr file has been compiled not from Corben's book "Neverwhere" but from the "Den" chapters of Heavy Metal magazine #1 to #13. Therefore it also includes "Den's Farewell" that is not in the TPB.
I owned the book over twenty years ago but it mysteriously went missing - purloined by one of my brothers, I suspect. I've long wanted to reread it and came across the cbr/cbz files of Heavy Metal while browsing the Web. Richard Corben's artwork is great and the storyline rather Tolkienesque, if a bit more saucy. Enjoy.