From Daniel Eran Dilger … Sencha embeds interactive CSS3 animations in iBook Author:
Web developer Sencha has now demonstrated how to use its graphical Sencha Animator tool (below) to build Flash-like animations with interactivity using the features of CSS3, which can then be incorporated into iBooks.
This lets non-programmers create interactive, animated content they can include in their own titles. Once created, users currently have to add an info.plist descriptor file and set the file type to .wdgt, identifying it as a Dashboard widget. The component can then simply be dragged into a iBooks Author page within an HTML widget.