We're probably what people call rotten. But I only feel rotten when I pretend to believe them."" This is Lucile, just thirty, self-indulgently indolent and irresponsible, when first met living with Charles, a soft, sad, unhappy but very wealthy fifty. ""An equation that can't last,"" which is said about Antoine; he's thirty and living with Diane, a woman of forty. Lucile and Antoine fall in love, and spend a summer of undiminished intensity (Diane throws Antoine out: Charles says he will wait for Lucile to return). But then Antoine wants Lucile to go to work, which she does for only a day or two-- she likes nice things, not cafeteria lunches; and then she is pregnant and wants Charles to pay for a more comfortable abortion than Antoine could; and then..... In France this has been Sagan's comeback book and perhaps it will be an apresmidi of Bonjour-- a little older, a little sadder, a little more irredeemable-- this world of sophisticated, casual pleasure. Certainly she can still write with that facile seduction the French can bring to love, all the way from nuance to passionate statement, from imperative impulse to indifference. So easily.