Farewell Horizontal — K.W. Jeter

The cylinder was the world and within it lived the Horizontal dwellers--factory drudges and the wealthy, privileged few. Seeking to escape the Horizontal, Ny Axxter, a free-lance graffex artist, took to the Vertical, the outside of the Cylinder. Here people traveled the cable network with microchip implants that let them tap into the computer-run economic and information net. Roaming among the warring military tribes that ruled the Vertical, Ny sought his big break. But when it came, he was caught in a tribal power struggle, pursued by a megassassin, and forced to flee to places no Vertical climber had ever seen before....