The trains in this book are hard at work! Discover all your favourites and lots more in this incredible collection.Packed with plenty to spot on each page - look inside a steam engine, travel up mountains or underground and zoom at record speeds on a bullet train!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.