I would think fair-use would entitle one who had purchased a book the right to lend it. What's next? If you lend a guitar to somebody whose is being repaired, can Martin Guitars sue you for cutting into a potential sale? If you order a pay-per-view concert or sporting event on cable, does the cable provider have a right to show up at your door and count heads to see how many people are watching? If you learn a tune from your fiddle teacher, must you never teach it to another fiddler?

Rich