Enhanced ebooks on iBooks?

To the best of my knowledge the enhanced version of the ASoIaF books are only available on iOS. I’m a person who buys multiple versions of the same book on different platforms, and the enhanced versions are definitely worth the cost. They include detailed maps of where the characters are, what they were doing from previous chapters and books, and their family trees of who they are related to. There is also an embedded glossary of terms that you can quickly pull up to research a particular phrase or name. They really take ebooks to the next level, now if only they would sync up with audiobooks like Kindle does...

Anyone else buy these books?