Sure, a number of major online publishers offer ePUB format digital books.
But how many of them give you all the interactive and liveliness that ePUB3 has been advocating.
How many give you a web reader which has all the features that an ePUB3 must support and runs on all browsers. WHile also giving you native reader apps.
Which one gives you all the authoring and book creation tools that you need in order to create an ePUB3 book.
Try it today!