A wealthy Brazilian businessman has bought a large area of open ground in the south of London on which he erects three gigantic masts. Working secretly with a large gang of Chinese labourers he then constructs a fantastic city on top -- which he claims is a pleasure palace. But is he running from some enemy, and is the city really for his own protection? Thomas Kirby, a journalist, sets out to discover the secret of the City in the Clouds. Novelist Guy Thorne wrote this book in 1921, and although he is looking forward a few years, this is not science fiction. It is a straightforward adventure romance based on a massive structure built in London with advanced engineering on an unlimited budget.