Den is a young man named David Ellis Norman. Following directions left for him on a note and a diagram from his missing uncle Dan, David builds another electronic apparatus. The apparatus opens a gateway to a fantasy world named "Neverwhere", where he was transformed into a hairless, nude, muscular, above-normal strength with martial arts fighting skills; prodigiously sexually endowed adventurer. Confused by his strange trip, he can only remember the acronym of his real name (DEN), and begins calling himself "Den".
Den's exploits... lusty and brawling, brimming with magic, intrigue, horror and betrayal...
Tim Pilcher calls Den "Conan on Viagra".