query: embed.html##defaultView:Map
  SELECT ?item ?itemLabel ?bookLabel (sample(?img) as ?img) ?coord ?url WHERE {
    ?item wdt:P625 ?coord.
    ?item wdt:P1343 ?book.
    ?book wdt:P361 wd:Q61723518.
    ?book wdt:P953 ?url.
    SERVICE wikibase:label { bd:serviceParam wikibase:language "sv". }
    OPTIONAL { ?item wdt:P18 ?img. }
  } group by ?item ?itemLabel ?bookLabel ?coord ?url 