: Sites like Project Gutenberg and epubBooks offer thousands of free, legal titles like Pride and Prejudice and The Great Gatsby .

: Services like Libby or Hoopla allow you to borrow ebooks from your local library in EPUB format. 2. How to Open and Read EPUBs

: If you buy books through Google Play Books or Kobo, you can often export them as EPUB files from your account library.

EPUB files require specific "reader" software to view because they are structured differently than PDFs. How To Export Google Play Books As PDF Or EPUB File