What book does this come from?

“Imagine knowing of creatures that can slip around the backside of five dimensions, creatures who, although wholly invisible and undetectable to our primate faculties, nevertheless exert a profound gravitational influence that can bring order to the entire universe. String theory opens up the intriguing possibility that these beings exist, that they have something to do with the fundamental principles governing our world, that they are, in fact, what we would call ‘gods’”