Error: E_ADEPT_DISTRIBUTOR-AUTH

I have just purchased a book that need for my studies. The bookstore told me that I need to download the Adobe Digital Editions to be able to view the book. Actually I planned to transfer it over to my Kindle, but that is beyond the point here.

I can't open the file on my normal machine, even... I keep getting this error and I really am at loss.

Please do help me on it. If possible also please explain how I can transfer that book later to my Kindle (via emial or otherwise).