This light comedy pivots on the life of high school student penelope, and her romance with Barney, who spends his summer chauffeuring a movie actress. The situations are inventive, the dialogue is lively, often amusing for a teen aged audience and there's a young and foolish breeziness to the whole amusing series of vignettes which will hypnotize the coke set. Originally the stories appeared in Seventeen and other magazines. Bencath the essay dialogue -- "" sisters are sisters under the pin"". . .""an embrace in the Pause That Caresses"".. is a solid core of adolescent woo and woes, of teen agers in the war between the generations. The imbroglio in which Penelope inadvertently donated Father's $150 topcoat to the League Rummage Sale scored with us.