+ if 'title_part' in request.GET:
+ title_part = request.GET['title_part']
+ if 'author_part' in request.GET:
+ author_part = request.GET['author_part']
+ if 'is_lektura' in request.GET:
+ is_lektura = request.GET['is_lektura']
+ if 'is_audiobook' in request.GET:
+ is_audiobook = request.GET['is_audiobook']
+