If you have an iPad or iPhone and you want to copy the ebooks to these devices, you must use iTunes on your computer and iBooks, and follow the related instructions.
If you have a Kindle, or you want to read the volumes on your computer (Mac or PC), we would recommend that you download and install Calibre, the de facto standard in ebook Library management software.
It's free, works on Mac and PC, and it's very easy to use.
You import each of your AWiiS ebooks and from there you can read them directly on your computer, send them to your device (apart from Apple, as above).