Title of a novel by Iain Banks. The central character is involved in a severe car crash, and a coma results. The narrative follows the lucid ``dreams'' of the main character, interspersed with flashbacks. The dreams take the character to a world spanned by a massive bridge (a classic Really Big Thing), large enough for cities to be built inside its structure, and for the ends to be invisible and unknown in the distance. Through adventure and discovery, the character travels through the dreamscape, eventually making a decision whether to wake or not.