Busy Machines! Slipcase Perfect for vehicle-mad kids, this really is the ultimate collection of busy machines. From planes to trains and everything in between, this 8-book slipcase is packed with every kind of vehicle you can think of, big and small, from around the world. Children will love the fun illustrations and simple text, packed with facts about their favourite vehicles. So whether its fire engines or tractors, there will be something for every child in this super set. Authors Amy Johnson & Claire Philip