epub_viewer-8.x-1.0/epub_module.routing.yml

epub_module.epub:
  path: '/view-ebook/{fid}'
  defaults:
    _controller: '\Drupal\epub_module\Controller\EpubController::viewEbook'
    _title: 'EPUB Viewer'
  requirements:
    _permission: 'access content'
epub_module.epub_settings_form:  
  path: '/admin/config/epub/epubsettings'  
  defaults:  
    _form: '\Drupal\epub_module\Form\EpubConfigForm'  
    _title: 'E-Book Viewer Configuration Form'  
  requirements:  
    _permission: 'access administration pages'  
  options:  
    _admin_route: TRUE