_After the ratification of the Palme-Silk treaty, Mr. Silk remained on New Texas, married the daughter of a local rancher there (see file on First Ambassador, Colonel Andrew Jackson Hickock) and is still active in politics on that planet, often in opposition to Solar League policies, which he seems to anticipate with an almost uncanny prescience._ Natalenko re-read the addendum, pursed his thick lips and sighed. There were so many ways he could be using Mr. Stephen Silk.... For example--he looked at the tri-di star-map, both usefully and beautifully decorating his walls--over there, where Hoddy Ringo had gone, near Alderbaran IX. Those were twin planets, one apparently settled by the equivalent descendants of the Edwards and the other inhabited by the children of a Jukes-Kallikak union. Even the Solar League Ambassadors there had taken the viewpoints of the planets to whom they were accredited, instead of the all-embracing view which their training should have given them.... Curious problem ... and, how would Stephen Silk have handled it? The Security Cooerdinator scrawled a note comprehensible only to himself.... Brilliant New Novel from Award-Winning Author of Alien Embassy! In MIRACLE VISITORS, Ian Watson has created a fascinating novel that explores the UFO phenomenon, a novel that will endlessly intrigue and envelop the reader. $1.95 [Illustration: Book Cover] Available wherever books are sold, or order by mail from Book Mailing Service, Box 690, Rockville Centre, N.Y. 11571. Please add 50c postage and handling. 109 ACE SCIENCE FICTION 360 PARK AVENUE SOUTH . NEW YORK, N.Y. 10010 Zero Population Growth Achieved! But at what cost? The world now exists with a mandatory abortion law and sexual freedom reigns. Is this truly a world where ... LOVE CONQUERS ALL $1.95 [Illustration: Book Cover] Available wherever books are sold, or order by mail from Book Mailing Service, Box 690, Rockville Centre, N.Y. 11571. Please add 50c postage and handling. 110 ACE SCIENCE FICTION 360 PARK AVENUE SOUTH .NEW YORK, N.Y. 10010 Four-Day Planet Fenris isn't a hell planet, but it's nobody's bargain. With 2,000-hour days and an 8,000-hour year, it alternates blazing heat with killing cold. A planet like that tends to breed a special kind of person: tough enough to stay alive and smart enough to make the best of it. When that kind of person discovers he's being cheated of wealth he's risked his life for, that kind of planet is ripe for revolution. Lone Star Planet New Texas: its citizens figure that name about says it all. The Solar League ambassador to the Lone Star Planet has the unenviable task of convincing New Texans that a s'Srauff attack is imminent, and dangerous. Unfortunately it's common knowledge that the s'Srauff are evolved from canine ancestors--and not a Texan alive is about to be scared of a talking dog! But unless he can get them to act, and fast, there won't be a Texan alive, scared or otherwise!