While most e-book websites offer their books in PDF or ePub formats, some don’t require the use of special software. It is usually best to select the book you want are interested in reading or downloading and seeing what options are available. E-books usually have clear indicators of which format they support. If you require an ePub reader, a quick Google search is usually enough to find an appropriate app that will allow you to view ePub files. Otherwise, PDF files are usually accessible with an internet browser, so you shouldn’t have difficulty viewing them.