+ hide_about = extra_info.get('about', '').startswith('http://wiki.wolnepodreczniki.pl')
+
+ projects = set()
+ for m in book.media.filter(type='mp3'):
+ # ogg files are always from the same project
+ meta = m.get_extra_info_value()
+ project = meta.get('project')
+ if not project:
+ # temporary fallback
+ project = u'CzytamySłuchając'
+
+ projects.add((project, meta.get('funded_by', '')))
+ projects = sorted(projects)