Edited the project urls.py

enzosalvador_reading/enzosalvador_reading/urls.py

@@ -14,8 +14,9 @@ Including another URLconf
     2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
 """
 from django.contrib import admin
-from django.urls import path
+from django.urls import include, path
 
 urlpatterns = [
+    path('bookshelf/', include('Bookshelf.urls')),
     path('admin/', admin.site.urls),
 ]