The 21st century has brought some new technological changes to the publishing industry. These changes include e-books , print on demand , and accessible publishing . E-books have been quickly growing in availability in major publishing markets such as the US and the UK since 2005. Google , Amazon.com , and Sony have been leaders in working with publishers and libraries to digitize books. As of early 2011, Amazon's Kindle reading device is a significant force in the market, along with the Apple iPad and the Nook from Barnes & Noble . Along with the growing popularity of e-books, some companies like Oyster and Scribd have pursued the subscription model, providing members unlimited access to a content library on a variety of digital reading devices. The ability to quickly and cost-effectively print on demand has meant that publishers no longer have to store books at warehouses if the book is in low or unknown demand. This is a huge advantage to small publishers who can now ...