The new Google Books format has degraded (in my mind) their interface, with dynamic overlays that become opaque to hide basic information about an item containing a search "hit" as soon as it finishes loading, or as soon as you interact with a page in any way (mouse or keyboard strikes). Here are the three steps in pictures: page, clear overlay, opaque overlay:
NB the thin white "floating" status bar box, at lower left, shows "waiting" in the first image, "loading" in the second, and which has disappeared in the third. It still isn’t clear to me why Google Books pages sometimes turns opaque as soon as the page finishes loading, and at other times, only once you interact with the page. But it conveys no information in either scenario since, even in the latter case it becomes opaque if you try to screencap the book information (i.e., before you interact with the page in any other way). Want to see the top of a page, or a page number? Tough luck. Want to centre or enlarge a highlighted term? Lol! Everything except the overlay page, with its puny title-box, disappears.
The thus-hidden page, displaying actual, useful information (such as book title, author, date of publication etc.), can only be reached by shutting down the overlay with mouse busy-work—there is no keyboard shortcut for this. By disregarding a warning on this page—that "Classic Google Books will [soon?] be turned off"—it is possible (for now), with yet more mouse-work, to reach the Classic Google Books interface. I’ll explain why you might want to do this shortly.
The obscured underlying page, the parent page or under-page (?), of the new interface is, admittedly, a better-organised version of the "About this book" page of the Classic Google Books interface, which was also a click-through. However, the Classic Google Books landing pages, the pages reached via search hits, were much more informative, making it possible to more-quickly shut down useless search hits.
All that remains visible on the overlay of the new interface is the first twenty characters of the title: so, "British Museum Catalogue of Printed Books: Edited 1881-1889 by R ..., Volume 52" becomes "British Museum Catal…" (as above); "The Magazine of American History with Notes and Queries, Volume 17" becomes "The Magazine of Am…"; and "Catalogue of the Private Library of Mr. George S. Davis" becomes "Catalogue of the Priv…"
The URLs reached via this new interface are also much longer than those in Classic Book Books. So, for instance, at their shortest (i.e., with search terms and other elements omitted), the URLs are
Old GB URL: https://books.google.com/books?id=rwJGAQAAMAAJ
New GB URL: https://www.google.com/books/edition/Catalogue_of_the_Private_Library_of_Mr_G/rwJGAQAAMAAJ
and for a specific page
Old GB URL: https://books.google.com/books?id=rwJGAQAAMAAJ&pg=PA49
New GB URL: https://www.google.com/books/edition/Catalogue_of_the_Private_Library_of_Mr_G/rwJGAQAAMAAJ?hl=en&gbpv=1&pg=PA49
It is unclear who benefits from the longer URLs: an AI crawler only needs "rwJGAQAAMAAJ" and a human gains little (in anything) from "Catalogue_of_the_Private_Library_of_Mr_G"—not least, since many browsers hide full URLs anyway, and those few that display URLs would be unable to display a full URL which has not had search terms and other elements omitted, as I have above. Personally, since I compose these posts in HTML, I find it a lot easier to read and write with the shorter, simpler Classic URLs. A Classic URL, with its 12-character ID (**), is also a lot more satisfactory for scholarship (i.e., in print), when referring to an online reproduction of a book, since it is easier for the writer and publisher to typeset/format and for the user to transcribe the URL and ID code.
So, while it is possible (for now, but it is unclear how much longer it will be possible) to click through from a Google Books search hit to the “Classic” interface, and from there, find the short URL and 12-character ID code for a book, and from that to generate a page-specific short URL, as above, doing so is now awkward and time-consuming; and since—given the warning—there is no guarantee that these short URLs will continue to work once "Classic Google Books [is] turned off," I will use the Internet Archive where I can, even for items on Google Books..
(**) Not alphanumeric: Google Books uses alphanumeric characters plus underscores, but excluding other special characters, these being "word characters" (apparently).
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