title: Google Books API returns diferent description lengths based on public vs authenticated requests
body: <p>Making a call to <a href="https://www.googleapis.com/books/v1/volumes?q=some+search+term" rel="nofollow noreferrer">https://www.googleapis.com/books/v1/volumes?q=some+search+term</a> returns an array of JSON objects, as expected, with with a full <code>volumeInfo.description</code> section. When I send an authenticated request to <a href="https://www.googleapis.com/books/v1/mylibrary/bookshelves/$%7BshelfId%7D/volumes" rel="nofollow noreferrer">https://www.googleapis.com/books/v1/mylibrary/bookshelves/${shelfId}/volumes</a> to get a specific book from a private bookshelf, <code>volumeInfo.description</code> is truncated.</p>
  <p>For example, searching for &quot;Harry Potter and the cursed child&quot; returns</p>
  <blockquote>
  <p>&quot;The official playscript of the original West End production of Harry
  Potter and the Cursed Child. It was always difficult being Harry
  Potter and it isn't much easier now that he is an overworked employee
  of the Ministry of Magic, a husband, and father of three school-age
  children. While Harry grapples with a past that refuses to stay where
  it belongs, his youngest son Albus must struggle with the weight of a
  family legacy he never wanted. As past and present fuse ominously,
  both father and son learn the uncomfortable truth: sometimes, darkness
  comes from unexpected places. The playscript for Harry Potter and the
  Cursed Child was originally released as a 'special rehearsal edition'
  alongside the opening of Jack Thorne's play in London's West End in
  summer 2016. Based on an original story by J.K. Rowling, John Tiffany
  and Jack Thorne, the play opened to rapturous reviews from
  theatregoers and critics alike, while the official playscript became
  an immediate global bestseller. This revised paperback edition updates
  the 'special rehearsal edition' with the conclusive and final dialogue
  from the play, which has subtly changed since its rehearsals, as well
  as a conversation piece between director John Tiffany and writer Jack
  Thorne, who share stories and insights about reading playscripts. This
  edition also includes useful background information including the
  Potter family tree and a timeline of events from the wizarding world
  prior to the beginning of Harry Potter and the Cursed Child.&quot;</p>
  </blockquote>
  <p>but getting the same book from a bookshelf returns</p>
  <blockquote>
  <p>&quot;The official playscript of the original West End production of Harry
  Potter and the Cursed Child. It was always difficult being Harry
  Potter and it isn't much easier now that he is an overworked employee
  of the Ministry of Magic, a husband, and ...&quot;</p>
  </blockquote>
  <p>I confirmed this behavior with Postman to make sure I wasn't doing something accidentally in my code. Is this expected behavior? I can't find any docs to explain this.</p>
  <p>I just noticed that there are other fields missing entirely from the authenticated call, like <code>volumeInfo.language</code>. Seems like the truncated description is probably on purpose, any confirmation would be appreciated.</p>