Enthralling . . . It gave one the sense of being led very near to the brink of profundity, even revelationFast, invigorating . . . anthropology, linguistics, despoliation of the environment, consciousness-raising drugs, space travel, alien contact, the CIA, you name it. Watson writes with energy and panache - Science Fiction: The 100 Best NovelsThe most impressive first sf novel to appear in the seventiesBrilliantly attempts to communicate a precarious truth about what we think is actuality. The effect is quite hallucinating - The TimesThe most spectacular thing in science fiction since the astounding Solaris - The SpectatorAmbitious and compelling - Daily TelegraphOne of the most thought-provoking shudders of the year - The Times