The Thirteenth Floor
The novel has been adapted several times into other media, including as the two-part German television film "World on a Wire" ("Welt am Draht", 1973), by Rainer Werner Fassbinder, "staying reasonably faithful to Galouye's book," as the film "The Thirteenth Floor" (1999) directed by Josef Rusnak, and as a play "World of Wires" (2012) directed by Jay Scheib.