I need to save textbook chapters to my local system when taking an online course, because for exams I cannot jump around in the course, I need to have the reference material available in advance. Digital Editions does not let me save a copy of a PDF that I purchased online. I do not want to go visit a website and click a link every time I need to open a PDF. Furthermore, I do not know where the PDF is being stored on my system because Digital Editions handles it "for me" (how nice). This software is annoying. I uninstalled it and went back to using Reader.