One hilarious Harlem familyis on a mission to find the perfect way to celebrate their Papas fortieth birthday while discovering more about their mysterious grandparentsin this heartfelt romp and latest installment to theNew York Times best-selling series, perfect for fans of the Penderwicks.Its summer on 141st Street, and the Vanderbeekers are lookingforward to Papas surprise fortieth birthday party. But then Papa must leave town to help hisbest friendand the Vanderbeeker children aresurprised to find their maternal grandparents on their doorstep. Grandma is very critical of everything they do. Meanwhile, they find themselves learning more about their papas father than ever before, and wishing they could have known him a bit better. Can they learn more about the grandfather they lost and come to appreciate the grandparents they still have while making sure their papa has the best birthday ever?