Well, that's actually very inaccurate. It's accurate for text-only books, but we're talking about next-gen iBook textbooks here. The next-gen iBook textbooks c

Well, that's actually very inaccurate. It's accurate for text-only books, but we're talking about next-gen iBook textbooks here. The next-gen iBook textbooks contains a lot of images, 3D and even video which takes up a lot of space. All the textbooks released so far takes up over 1GB of space each. This one, a biology textbook, is 2,77GB for example: http://itunes.apple.com/us/book/biology/id490038442?mt=13 http://itunes.apple.com/us/book/biology/id490038442?mt=13