I notice web results without tbm parameter return relevant results as in
https://www.google.com/search?q=Narz...y+Jeremy+Black
While book search results return entirely irrelevant hits:
https://www.google.com/search?q=Narz...+Black&tbm=bks
This one looks to deliver personalized results, according to user location and previous searches.
On a slightly unrelated note...
https://archive.ph/https://twitter.c...07759326957584 and
https://archive.ph/https://twitter.c...66075033575425