Originally Posted by Baroness
I'm a big fan of iBooks, so I'll jump into the margin discussion: On the iPhone 5 (and so I presume it's the same for the iPod Touch 5), the margins in iBooks aren't bothersome -- at least, they're not bothersome for me any more. I do recall them being a little bit annoying on the iPod Touch 4, but on the iPhone 5 I'm much more comfortable with the amount of text on a page. It's probably the added height creating a more comfortable experience, but as somebody who enjoys the 'bookish' appearance, I actually like the margins which are there.
You don't just lose space on the margins, but also above and below with the book title and page numbers.