is "On other floors ( Changing Planes) by Ursula K. Le Guin, best known for books set up Earthsea / TERRAMARA. A book out of print for years, praised long ago by a friend of mine, and miraculously managed to find a used book fair.
The book focuses on the method invented by Sita Dulip, tube traveler from Cincinnati, which allows you to visit other dimensions (planes) from a flight to another, while waiting on uncomfortable seats dell'areoporto (the discomfort and boredom are conditions necessary for travel size). Note that in the Italian translation of the title is lost the curious play on words: Changing Planes literally means is "aroplano change" that "change plan".
Each chapter of the book is the description by the author of one of her wacky plans to visit during this waiting at the airport, using the method Sita Dulip, or in the record made him by some of his friends.
The book reveals, however, be quite a missed opportunity: no objections on the writing style, simple and elegant. The real problem is the content. Each chapter is basically a story in itself, and not all have the same level: if a chapter like that of children without sleep Hy Brisal may be intriguing, others have very few interesting ideas, which also are not even well developed, but only sketched. Lacks a true wonder of escalation between a plan and the next, that should the main objective of such a novel. The feeling you get is going to read a more dull "We hope that the next plan is fun."
Ultimately it is a book that can be understood if you do not have anything better, but the content does not remain imprinted in their memories long.