I've never been interested into reading books on my iPad or iPhone for a couple reasons. First, I spend all day staring at a screen, so when I want to relax and read a book, I want to look at anything but another screen. Second, and maybe more importantly, having developed bad carpal tunnel syndrome from spending too much time on a computer, I really don't need to make things worse by holding an iPad in my hand when I want to read.
This being said, I understand the practicality of reading books on an iPad or any eReader. You can fit many more books in an iPad than you could in the trunk of your car. Besides, this post isn't about why I like or dislike the iBookstore. It's about the process of updating a book purchased on it...