Serial Experiments Lain: The Nightmare of Fabrication

The Nightmare of Fabrication is a beautifully drawn full-color manga from Yoshitoshi ABe. The 18 page short story can be found in the Lain Omnipresence in Wired artbook. The manga serves as the missing "Dc1029" file from the game and appears to take place in the same continuity as the game, although there are elements of the anime as well.