This year's Newbery winner returns to her popular comic mode--now with a third book about the Tates of N.Y.C.'s West 83rd Street (Switcharound, 1985). At 13, J.P. is more interested in chess than gifts until golden-haired Angela joins his class, and (to his own disgust) J.P. bursts into an interior monologue of admiring clichés ("teeth like pearls"). No problem--Angela likes him, too--but, in a moment of weakness, J.P. tells her that he has a rare, fatal disease ("triple framosis"); while the lie wins him sympathy, maintaining it results in complications. Meanwhile, the two team up for the "Spring Fling," dressing as golf bags; and by the time J.P. manages to win the day's chess tournament--despite his uncomfortably restrictive garb--he's learned that chess rival Hope is his truer friend. Like Byars' Bingo Brown, J.P. is a thoroughly likable, realistically self-absorbed, bright boy whose escapades and soul-searching provide insights as well as laughter. Here, Ralph--an old man J.P. meets who challenges him to an alphabetical competition of ailments--provides an amusing vehicle for a more serious subtext as J.P. matches his adolescent acne and body odor against Ralph's alopecia, bursitis, and cataracts. Later, it's Ralph who helps J.P. decide that the character flaws that worry J.P. should be taken in hand early. A memorably funny book.