from ebooklib import epub

book = epub.readEPUB('test.epub')

from ebooklib import epub

book = epub.EpubBook()

# set metadata
book.set_identifier('id123456')
book.set_title('Sample book')
book.set_language('en')

book.add_author('Author Authorowski')
book.add_author('Danko Bananko', file_as='Gospodin Danko Bananko', role='ill', uid='coauthor')

# create chapter
c1 = epub.EpubHtml(title='Intro', file_name='chap_01.xhtml', lang='hr')
c1.content=u'<h1>Intro heading</h1><p>Žaba je skočila u baru.</p>'

# add chapter
book.add_item(c1)

# define Table Of Contents
book.toc = (epub.Link('chap_01.xhtml', 'Introduction', 'intro'),
             (epub.Section('Simple book'),
             (c1, ))
            )

# add default NCX and Nav file
book.add_item(epub.EpubNcx())
book.add_item(epub.EpubNav())

# define CSS style
style = 'BODY {color: white;}'
nav_css = epub.EpubItem(uid="style_nav", file_name="style/nav.css", media_type="text/css", content=style)

# add CSS file
book.add_item(nav_css)

# basic spine
book.spine = ['nav', c1]

# write to the file
epub.writeEPUB('test.epub', book, {})