When the Empire State building in New York was built 70 years ago, 3500 workers were employed on the site. One of them was 16-year-old Joe Carbonelli, whose job it was to carry drinking water up to the other workers. This is his story of how in only 18 months the world's tallest skyscraper was built. People called it the eighth Wonder of the World. This book is one of a series which takes the reader into the world of building - from a simple hut to a high-tech structure.