Google metadata download suboptimal search

[Gauthier Van Vreckem]

From the log:
https://books.google.com/books/feeds/volumes?q=intitle%3ADragon+intitle%3ADone+intitle%3AIt%2Binauthor%3AEric+inauthor%3AFlint&max-results=20&start-index=1&min-viewability=none

gives 0 result
I'm not sure why the log show a mix of %2B and + but that doesn't seems to be the issue.

modifying to:

https://books.google.com/books/feeds/volumes?q=intitle%3ADragon%20Done%20It%2Binauthor%3AEric%20Flint&max-results=20&start-index=1&min-viewability=none

gives 3 result

https://books.google.com/books/feeds/volumes?q=intitle%3ADragon%20Done%20It%2Binauthor%3AEric+inauthor%3AFlint&max-results=20&start-index=1&min-viewability=none

also gives 0 results

https://books.google.com/books/feeds/volumes?q=intitle%3ADragon+intitle%3ADone+intitle%3AIt%2Binauthor%3AEric%20Flint&max-results=20&start-index=1&min-viewability=none

also gives 0 results.
In fact any combination of multiple use of the same query tag either intitle or inauthor seems to fail

[Gauthier Van Vreckem (gauthier-van-vreckem)]

Note that the failure is not systematic for all title.
https://books.google.com/books/feeds/volumes?q=intitle%3AYellow+intitle%3AEyes%2Binauthor%3AJohn+inauthor%3ARingo&max-results=20&start-index=1&min-viewability=none

gives 1 result

And grouped with %20 instead of multiple intitle

https://books.google.com/books/feeds/volumes?q=intitle%3AYellow%20Eyes%2Binauthor%3AJohn+inauthor%3ARingo&max-results=20&start-index=1&min-viewability=none

gives 2 result

[Kovid Goyal (kovid)]

Using %20 to quote spaces and a single intitle/inauthor just yields results that
match on a single term in the query (results below). Using multiple intitle/inauthor
forces all the search terms to match, which is desired behavior,
otherwise google books yields too many false results. Your problem is
simply because Dragon Done It is not in the google books index.

****************************** Relevance: 0 ******************************
Title : Between the Devil and the Dragon: The Best Essays and Aphorisms of Eric Hoffer
Author(s) : Eric Hoffer
Publisher : Harper & Row
Tags : Social Science, General
Languages : eng
Published : 1982-07-15T02:51:41.428228+00:00
Identifiers : google:j7DZAAAAMAAJ, isbn:9780060149840
Comments : This collection of the major writings of American longshoreman-philosopher Eric Hoffer includes the complete text of "The True Believer" and important essays and aphorisms from all of his works

Cached cover URL : https://books.google.com/books?id=j7DZAAAAMAAJ&printsec=frontcover&img=1
***************************************************************************

****************************** Relevance: 1 ******************************
Title : Between the Devil and the Dragon: The Best Essays and Aphorisms of Eric Hoffer
Author(s) : Eric Hoffer
Publisher : Harper & Row
Tags : Social Science, General
Languages : eng
Published : 1982-07-15T02:51:42.649039+00:00
Identifiers : google:j7DZAAAAMAAJ, isbn:9780060149840
Comments : This collection of the major writings of American longshoreman-philosopher Eric Hoffer includes the complete text of "The True Believer" and important essays and aphorisms from all of his works

Cached cover URL : https://books.google.com/books?id=j7DZAAAAMAAJ&printsec=frontcover&img=1
***************************************************************************

[Kovid Goyal (kovid)]

The book is actually present in google books https://www.google.co.in/books/edition/The_Dragon_Done_It/E7V0CwAAQBAJ?hl=en&gbpv=0

however it doesn't show up when searching via the books.google.com feed
api it might be a good idea to search directly via google.com with tbm=bks where it
does show up.

[Kovid Goyal (kovid)]

Fixed in branch master. The fix will be in the next release. calibre is usually released every alternate Friday.

 status fixreleased