Stargirl
by Jerry Spinelli (Alfred A. Knopf, 2000); audiobook read by John H. Ritter (Books on Tape, 2006)
Very MG in delivery, the titular character being painted to an extreme and the narrator balancing her out by having almost no personality (beyond a fondness for porcupine neckties, kept very much in the closet). The ending at least is somewhat unexpected.