I have several times encountered a situation that some particular book had preview in Google Books, but later the same book (on the same link) was without preview.On several occasions I have, for example, included link to some particular page on Google Books in a post on some Stack Exchange site. I distinctly remember that at the time when I posted the link, the preview was available. Of course, I am aware that preview is not available for all users and it is limited. But when I follow the same link now, which means that I get the same book and the same edition, the preview is not available anymore. I have noticed this in a books about mathematics, since this is the area for which I most frequently search something on Google Books. The examples I was able to find were books published between 1990 and 2000, so they are not very recent books.I suppose that preview on Google Books depends on some kind of agreement between Google and the publisher of the particular book. But I am somewhat surprised, that the possibility of preview the book (and search in it) is changed. What are the reasons why preview is removed from some books?
Why does Google Books occasionaly change some books, which had previews, to no preview?
google books