bookreader is a desktop app for reading .pdf and .epub
bookreader uses electronjs for rendering the app, and uses epubjs along with pdfjs for rendering epubs and pdfs respectively.
bookreader was created as an open source project due to the lack of desktop apps that read .epub extensions.
bookreader also simplifies the GUI of conventional file readers, making it easy for casual users.
Click the 'Browse' button and search your file or you could just drag a file and drop it over and the app will load it for you.