Gerrold has a pleasantly light and breezy style and a decent sense of humor, so the mostly slight stories in this book are a quick and entertaining read. "The Kennedy Enterprise", the story of an alternate-history version of Star Trek which starred JFK, is typical: Gerrold deftly makes the whole thing sound almost plausible, dropping all the principals -- Shatner, Nimoy, Roddenberry, RFK -- cleverly into place, and seeding the whole thing with little jokes (e.g., JFK and Marilyn Monroe never meet in this universe). Of course, it helps that Gerrold used to write for Star Trek himself: his most famous episode was "The Trouble With Tribbles", so of course he has JFK reject that idea as being unsuited to his dignity as Captain of the Enterprise. Other stories are similar: "Franz Kafka, Superhero" is a slightly demented joke about Kafka and Freud, "What Goes Around" has Sharon Tate and Roman Polanski's son murder the Manson Family, etc. A couple of the stories stumble when Gerrold tries to be little more earnest -- "The Impeachment of Adlai Stevenson" is a bit too unsubtle, "The Firebringers" verges on the schmaltzy -- but anybody looking for some science fiction that reads easily and mostly doesn't take itself too seriously will enjoy this book: it won't change your life, but it's a pleasant enough way to while away a Sunday afternoon, and there's nothing wrong with that.