poor and badly functioning Digital Dditions

I bought an e-book and expected to get a pdf file and was quite disappointed to find out I had to first download Digital Editions to really download the book, just to find out that I can only read it through Digital Editions: only a few functions and not even working properly, nothing near a pdf file you can work with. Spent time highlighting text, which then completeley disappeared! Even this post gives you more opportunities for editing! And hopefully saves what you write better that Digital Editions!!! This product needs urgent improvements!