Thanks to both of you. I did take ninjumpers advice and use Calibre to convert the files. I understand why you would tell me not to, Dark Guyver, but as I do most of my reading on my phone, it's easier to use epub and a reading app than adobe. I know Google Play Books is supposed to be able to read and open pdfs but when I try and open a pdf file on my phone, it doesn't give me Google Play Books as an option of apps to choose from. On the plus side, I didn't notice any differences in presentation so far.