Please don't mind the trivial details. Just take the books and go away happily. I use Android and it works fine for me. For Android there are a lot of alternatives for PDF and EPUB readers on Play Store. For PDF reader I use ComicScreen. For EPUB reader I use Skoob EPUB reader. Just look it up on Play Store. The site has complete collection of writings of the saints from A to Z to download in PDF and EPUB format. God Bless