
Urban's keen sense of pacing allows readers to be swept up by the humor and taken by surprise in moments of poignancy. After repeatedly requesting a piano, Zoe finds herself with a Perfectone D-60 ("A wood-grained, vinyl-seated, wheeze-bag organ") and six months of free lessons from Mabelline Person, who demands Vernors in a glass with ice. Most of the time, Zoe is an A+ lemonade-maker whose perseverance winds up inspiring everyone around her. Zoe's teacher even recommends that she compete in the Perfectone Perform-O-Rama. On her 11th birthday, however, when her mother misses her celebration due to a "ledger emergency," Zoe breaks down like an organ unplugged during a sustained chord. But that makes her human. After all, as Zoe points out, it was Horowitz who said, "Perfection itself is imperfection." Zoe's father, Wheeler Diggs and even Hugh the UPS man make surprising contributions as these winning characters--Zoe chief among them--travel along the road to a crooked kind of perfect.--Jennifer M. Brown