I got an access code for an online textbook and uploaded it on my Mac laptop in January.
180-day Subscription Astronomy Today: The Solar System.9th ed. Pearson Addison-Wesley
I went to use it and it has deleted out of my library on the Adobe Digitial Editions and when I go to my library it says I have no book. I need assistance on how to get it back as I need it for my course and I paid for it.