This is obligingly made to order for libraries seeking material on black kids in recognizable urban situations--but even McCully's black-and-white line and wash drawings signal the thin, unimaginative nature of the plotless, blandly related everyday adventure. It tells of a Brooklyn eight;year-old who is separated from his class on a school trip to Manhattan. Before reporting himself to a token seller, who calls the transit police (""Joseph, do you know how many people are looking for you?"" asks the patrolman reassuringly), Joseph has a friendly encounter with a shopping bag lady, winds up on an uptown train instead of a train back to Brooklyn, and is dared by another kid into a scary one-stop ride between cars. The plight of being lost and the precariousness of that last ride might keep readers hanging on with Joseph.