url(r'^reading/(?P<slug>[a-z0-9-]+)/$', reading_resource, name='api_reading'),
url(r'^reading/(?P<slug>[a-z0-9-]+)/(?P<state>[a-z]+)/$', reading_resource, name='api_reading'),
url(r'^shelf/(?P<state>[a-z]+)/$', shelf_resource, name='api_shelf'),
url(r'^reading/(?P<slug>[a-z0-9-]+)/$', reading_resource, name='api_reading'),
url(r'^reading/(?P<slug>[a-z0-9-]+)/(?P<state>[a-z]+)/$', reading_resource, name='api_reading'),
url(r'^shelf/(?P<state>[a-z]+)/$', shelf_resource, name='api_shelf'),