Calvino's masterpiece opens with a scene that's reassuringly commonplace: apparently. Indeed, it's taking place now. A reader goes into a bookshop to buy a book: not any book, but the latest Calvino, the book you are holding in your hands. Or is it? Are you the reader? Is this the book? Beware. All assumptions are dangerous on this most bewitching switch-back ride to the heart of storytelling.

In Invisible Cities Marco Polo conjures up cities of magical times for his host, the Chinese ruler Kublai Khan, but gradually it becomes clear that he is actually describing one city: Venice. As Gore Vidal wrote 'Of all tasks, describing the contents of a book is the most difficult and in the case of a marvellous invention like Invisible Cities, perfectly irrelevant.'