The vehicles in this book are hard at work! Discover all your favourite diggers and even more big working vehicles in this incredible collection.Packed with plenty to spot on each page - discover dumpers, diggers, dozers ... and don't forget your hard hat!Wheels at Work is a bright and busy series for vehicle-obsessed young readers to spot all their favourite things that go and discover lots more.It is packed with plenty to see, learn and talk about on each page and features fun facts at the end of each book, plus a 'can you spot?' page to encourage repeat reading. Collect the set! Cars; Diggers; Trucks and Trains.