A novel yet he hasn't written -- but this consists, as you might guess from. the title, of snatches of Long Island, relatively young, Jewish married life in the form of one-liners (""Say, Sallie... Don't you ever talk to this plant?"") to vignette-lets with chapter headings from THE HOUR OF DECISION to SO BE IT. His or Her exchanges between Sallie and Sidney Stein and their two youngsters -- Sidney wants his socks lines up (at least not folded) in his drawer and Sallie talks to her friend Diane on the phone, enlightened by her Dr. Feuerbach and emancipated by her Lib Group all the way to a divorce; and there's a forgotten birthday or a mother-in-law or an outing of the Mystery Club or a bad back -- everyday existence which is certainly everyday. Mr. Rubin approaches it with a kind of good humor and SO BE IT toleration even if it doesn't have any more stamina than the potato chip.