No. You really shouldn't do this out of respect for the book's author and the time and effort they put into their work. You can lend one friend the book of course, or even multiple friends in turn but when you start making photocopies you should be asking yourself if it wouldn't be of more benefit to the quilting community as a whole if you bought a few more copies of the book to share around. The common practice is that you can make a working photocopy for yourself to make notes on the pattern for example, but you shouldn't really be making multiple copies so that your friends don't need to buy the book.