The more you read, the more you realize you want to read, for each book generates a further reading list. Only occasional readers imagine that reading is a matter of working through a list of classics, like moving a pile of logs. The rest of us know that every ‘classic’ multiplies infinitely into minor classics, frivolities and squibs. You cannot possibly read them all now, but you know you want to read them one day. Some of these you will buy and, although they may remain unread, they contain a promise of future pleasure and their company alone helps sustain an idea of yourself, and of the world.