The Manifold Trilogy is a series of science fiction books by British author Stephen Baxter. The series was published from 1999 to 2003. It consists of three novels and an anthology of short stories relating to the three. The three novels in the trilogy are not ordered chronologically; instead, they are thematically linked novels that take place in alternate universes. The series consists of: * Manifold: Time - Arthur C. Clarke Award nominee, 2000 * Manifold: Space * Manifold: Origin * Phase Space (short stories)