Interactive content for digital books

摘要: This disclosure describes systems, methods, and computer program products for presenting interactive content digital books. In some implementations, a graphical user interface (GUI) is presented that allows to view interact with embedded in book. The can include, but not limited to, text, image galleries, multimedia presentations, video, HTML, animated static diagrams, charts, tables, visual dictionaries, review questions, three-dimensional (3D) animation any other known media content. For example, various touch gestures be used by the move through images play answer manipulate objects, HTML.