Apple has updated their office suit, iWork, today. iWork 9.0.4 addresses issues in Keynote, Pages, and Numbers, and adds export compatibility to Pages with the standard ePub file format (for use with iBooks).
These ePub books can be copied to the iPhone and iPad and loaded using the iBooks ebook app.
To produce an ePub file follow these instruction: in Pages go to the Files menu, choose Export then click on the ePub tab.
Enter the book title, author and genre. Click next and save the file.
Download link: iWork 9.0.4.
More information about this update: iWork: About the iWork 9.0.4 update.
Arabic version of this post on SaudiMac Arabic Edition.