Cheap eBook Store ?

I bought my textbook in hardback form and then the online code for the book as well. The online ebook is ran in adobe flash and I would really like to have it on my e-reader so I dont have to bring a laptop or real book to class everyday. is it possible to download the book? and convert a file? or I cant because it is stuck in adobe flash form with no option to download file anywhere?

maybe you can find some compatible ebook reader…or simply google that thing..