This dump truck has a bad attitude. It's not easy being a dump truck, hauling heavy dirt from one place to the next. All that work has made Bertrand decidedly grouchy. But when he meets Tilly, a cheerful porcupine construction worker, Bertrand's attitude begins to change. Can this grumpy dump truck learn to be nice? Brie Spangler's hilarious new picture book is perfect for little truck lovers!.