There were many free mobile e-book editors such as iBooks, Google Play Books, Amazon's Amazon Store, and other applications that could create and edit mobile e-books. These applications provide a wealth of features and editing tools that help you easily create and edit high-quality eBooks. Here are some free mobile e-book editor applications and their brief introductions: 1 iBooks: iBooks is a very popular free e-book editor that can be used on Apple and Android devices. It provides a wealth of editing functions, including font, color, image, link, etc. You can easily create and edit your own e-book. 2 Google Play Books: Google Play Books is a free e-book editor that can be downloaded from the Google Play store. It provides a variety of font, format and theme to easily create and edit your own e-book. 3. Amazon's Amazon is another free e-book editor that can be downloaded from the Amazon website. It provides a variety of font, format, and theme to easily create and edit your own e-book. These three applications are all very popular free mobile e-book editors. You can choose an application that suits your needs.