list_display = ('title', 'slug', 'created_at', 'has_epub_file', 'has_html_file', 'has_description',)
search_fields = ('title',)
ordering = ('title',)
list_display = ('title', 'slug', 'created_at', 'has_epub_file', 'has_html_file', 'has_description',)
search_fields = ('title',)
ordering = ('title',)