Gr 7-10 Sandwiched in age between twin sisters and a ``surprise'' younger brother, Hughie McBride feels invisible. Zee, his childhood friend and confidante, announces that she is pregnantby Jordie, boyfriend of Melissa, on whom Hughie has a crush. True to the good guy mold into which he has always been cast, Hughie sees Zee through her pregnancy and his mom through a mid-life crisis. In the process, he realizes that he has been the pivotal influence in his family all along. Although humorous and at times touching, this book presents a paradox of the predictable coupled with the puzzling. The socialite set of Jordie and Melissa are stereotypically shallow and materialistic, and the outcomes of the pregnancy triangle and Hughie's brother's mink business are no surprise. Yet, the subplots of Hughie's mother running off and Jordie's about-face regarding the baby are not foreshadowed and therefore are confusing. Hughie, kind and well-meaning, seems to embody the obvious characteristics of a teenage male (clothes on the floor, locker room talk), yet he acts and reacts in a protective, nurturing manner that is almost motherly. In short, he strikes readers as a female's idea of what a male is, or in this case, should be. Ron Koertge ( Where the Kissing Never Stops Atlantic, 1986) and Todd Strasser (Working for Peanuts Delacorte, 1983) handle the male view on sex and love much more credibly. Joanne Aswell, Hunterdon County Lib . , Flemington, N.J.