A、By allowing libraries to purchase e-books for lending in perpetuity. B、By requiring libraries to purchase more of its e-book.

Amazon. com launched its Kindle library-lending service in the United States. Millions of users of the Kindle reader and app can now borrow Kindle books from their local public library. The service will be available through the websites of more than eleven thousand local libraries across the country.
    Users of other devices have already been able to borrow library books. Experts say Amazon’s entry is likely to reopen a debate between publishers and libraries over e-book lending.
    Bill Rosenblatt is president of Giant Steps Media Technology Strategies, a consulting company. He says, "Publishers and libraries are enemies that occur in nature like snakes and monkeys. Libraries would like to be able to make books available to everyone, all the time, with no limitations. And publishers, of course, would like to sell more books to the public. "
    Mr. Rosenblatt says the debate in the United States centers on what is known as the law of first sale. Once you buy any kind of media product such as a book or a CD or a DVD or anything like that, you can do whatever you want with it. You can read it, you can give it away, you can lend it, you can resell it, you can burn it—whatever you want. This law is referred to as "first sale".
    This law is what permits libraries to lend books over and over again without having to pay publishers each time. But Bill Rosenblatt points out that it does not include digital products. Technology known as digital rights management can make e-books unreadable once they have reached a certain time or user limit.
    Mr. Rosenblatt says, "Several months ago, one of the major publishers, HarperCollins, which is a division of News Corp, announced that they were only going to allow e-books to be lent out twenty-six times, and then they would have to be purchased by the libraries again. Apart from HarperCollins, publishers are allowing libraries to purchase e-books for lending in perpetuity, meaning as many times as anyone wants to borrow them. "
    HarperCollins says it took the action to protect the growing e-book industry and its own book sales. But Bill Rosenblatt says critics did not see it that way. They believe a digital book should be lendable forever.
    23. What can be learnt about Amazon. coin’s Kindle library-lending service?
    24. What can libraries do according to the "first sale" law?
    25. How did HarperCollins protect the e-book industry and its own book sales?