Free Digital Book Builder - Version 1.0 The free digital book builder is an easy-to-use software to make digital book from txt file. With this free digital book builder, you would not worry about organizing txt file or read txt file on mobile, as you can make mobile version of digital book with free digital book builder. The mobile version of digital book can be read on iphone, ipad and Android mobile devices. The most apparent factor of digital book is page turning effect and real-book-like appearance which would make your or other readers enjoy a fresh reading. In addition, you can also make flip pages automatically of digital book and insert sound as background music. What's more, you can make mini digital flip book and embed it to your existing web page.