I am an ebook fan, rarely buy paper anymore. I ordered the ebook so I can say a few things about its portability. It is not in a format that can be read by any of the dedicated ebook readers out there - Sony, Kindle, Nook, Kobo etc. They require books to be in either epub or mobi depending on the device. These books are in a proprietary drm’d “vbk” format. Having said that I found an app for my ipod touch from Vital Source that I am sure will work with the Ipad too and might be better than the pure browser experience. It was free so you might want to give it a try. I expect it will require connectivity to access the cloud version of the text rather than downloading the book onto the device itself so offline work probably won’t be possible. I doubt I will spend a lot of time reading on my touch but I might if I had an Ipad.
Mel