This is a funny old book, I must say. Some 248 pages about how aeroplanes fly. Chapter headings like Cockpit Instruments, Airplane Fuel and Flight Statistics. Who is it supposed to be for? Not pilots, surely, since they already know how planes fly. And not holiday-makers who happily jet from beach to beach, because they don't especially care. The only people I can imagine buying a book which explains the concept of flying are those who are frightened of it.