If a book did nothing else for you, other than to save you from the company of other people; if all it did was to deliver you from their gossip, and their dull affairs, and their appalling manners, and their rotten Arabic, and their stupid ideas, and their woefully misguided opinions, and above all, from the need to be polite to them; if a book did nothing more than that, it would still be the best friend you ever had.