I have had so much trouble with Sony's software that I am looking for something else. Up until I read about Calibre in one of these forums, I had never heard of it. After reading about it on the website, I think it may be for me! (at least the parts I could understand!) If I understood things correctly, Calibre is more of a "management" software rather than a "store", correct? Do I need to have my Sony software installed for Calibre to work? Where are the best places to order my ebooks? Do I need to have any other software installed for Calibre to do it's job? Is there anything else I may need to know before I decide to download Calibre's software? I would appreciate any help I can get...I'm just so fed up with Sony, but I hate to see my PRS600 be a waste of money because I can't get the software to open or be able to get to the Sony store...thanks!