Throughout its 17-year history, Amazon has helped change the way that books are sold, the format in which they’re read and how they are published. Now it could change how they’re written. In addition to the Kindle Fire HD and the Kindle Paperwhite, Amazon introduced a subscription book format at a press conference in Los Angeles Thursday. These books, called “Kindle Serials,” will be released in segments instead of in their entirety. Updates, or “episodes,” automatically appear at the back of the book as they’re created or released without extra charge. Read the full story at Fast Company.