I wouldn't have a problem with the LQS wanting you to purchase the book they are teaching a class from - they are making money from the classes, so the author of the book should get something to. By teaching the class from that book, for their business, they are going beyond personal use. I'd share with my neighbor, though, if she liked the quilt that resulted from the class. I'm not making anything (except a better friendship) by sharing. OK in my book.