4U.S. eBook Sales to Surpass Printed Book Sales in 2017[EB/ OL]. [2015-09-25].http://www. statista, com/chart/l159/ebook- sates-to-surpass-printed-book-sates-[n-2017/.
6Bookindy Chrome extension lists local options for books on Amazon [EB/OL]. [2015-06-05].http://www. engadget. com/2015/O6/OS/bookindy-bookstore-chrome-extension/?ncid= txtlnkusaolp00000589.
7Have Borderlands Books in San Francisco hit on a survival formula?[EB/OL]. [2015-02-25].http://www.theguardian, com/books/2015/feb/25/borderlands-books-san- francisco-sponsorships-crowdfunding.
8Welcome Authors of the Rocky Mountains![EB/OL]. [2015-10-09].http://www. tatteredcover, com/local-authors.