One hilarious Harlem family is on a mission to find the perfect way to celebrate their Papa's fortieth birthday while discovering more about their mysterious grandparents in this heartfelt romp and latest installment to the New York Times best-selling series, perfect for fans of the Penderwicks. It's summer on 141st Street, and the Vanderbeekers are looking forward to Papa's surprise fortieth birthday party. But then Papa must leave town to help his...