An agreeable and varied spacer's dozen. Harrison and Aldiss give us the staid (a so-so Algis Budrys on a more subtly murderous future New York; Richard Cowper's lukewarm prophetic-vision-survives-in-secluded-monastery) and the lively (Louis Phillip's poem on ""The Lop-Eared Cat that Devoured Philadelphia""; Stephen Robinett's 21st-century brain-picking racket). Most unexpected: John Updike's story of a world whose forbidden fruit is music. Most brilliant: M. John Harrison's metaphysical tour de force about a future England antiseptically programmed by a mysteriously returned God Other noted contributors: Tom Disch, Michael Moorcock, Joe Haldeman (a generous chunk of The Forever War), Barry Malzberg (a hifalutin' doodle in the form of ""notes toward a novelette""). Middling.