This is an example of how to read an epub file using epublib.

// read epub file
EpubReader epubReader = new EpubReader();
Book book = epubReader.readEpub(new FileInputStream(“mybook.epub”));

// print the first title
List<String> titles = book.getMetadata().getTitles();
System.out.println(“book title:” + (titles.isEmpty() ? “book has no title” : titles.get(0)));