iBooks Author :

iBooks Author (iBA) is an eBook authoring application by Apple Inc.
Allzone Digital Services creates presentable multi-touch textbooks in iBooks Author format.

The output of iBooks Author is a proprietary Apple file format similar to the EPUB standard.

iBooks Author makes it simple to flow in text, graphics, galleries, video, interactive diagrams, 3D objects, movies, shapes, charts, tables, Question & Answers and Multi-Touch widgets.