The Very Last Virgin at Hoebeck High, Grace Williams (New American Library: $2.50). Sex--or the lack of it--has 16-year-old Annie Galvin over a barrel. The way she figures it, she's the only virgin at Hoebeck High School. That prospect chills her to the bone. To lose her dubious status, she embarks on an odd quest that leads her through encounters with birth-control pills, sexy underwear, the school stud, jealousy, drugs, booze, parties, fights, love, pettiness and pain. While all this may sound like a questionable premise for a young-adult novel, rest assured that, in the end, Annie has her morals straight. But this is a novel in which the journey is far more important than the destination, so to merely state that everything ends happily would be to miss all the fun of Annie's misadventures and the charm of her personality. Yes, virginity, there is still room for you in this world.