iBooks Author 2.4 has been released by Apple, and it includes enhancements to its recently introduced EPUB (or, as Apple consistently insists on misspelling it, “ePub”) templates. The notable enhancement is that EPUBs produced by iBooks Author can now employ Pop-Over widgets. In addition, the release note says that EPUB templates in 2.4 also include unspecified “minor usability improvements.”
Apple followed up the release notes provided in Software Update with an email to users of iTunes Connect that describes import improvements in iBooks Author:
With the latest version of iBooks Author, we have improved the import function for Pages and Microsoft Word documents. For best results, you should use section breaks between chapters when you write your book in Pages or Microsoft Word.