Here is the link to "Labyrinth of Reflections". It is a novel of one of the today's most popular Russian Sci-Fi writers: Sergey Lukjanenko. http://lib.ru/LUKXQN/labirintengl.txt
My first thought after .hack//Sign 01 was: "It can't be! Anime based on my favorite book!" ^_^
This novel is the real 'cult book' of the Russian Internet.
I read it all and loved it a lot, looking for the other two labyrinth books translated to english also, but i doubt .hack is based on it, they're pretty different.
Kairu wrote:i doubt .hack is based on it, they're pretty different.
You are right. But the first series of .hack is looked like some parts of the "Labyrinth". Tsukasa, who can't log out from "The World"... He reminded me the Unfortunate.