Yep, first instance I know of was from back in 2009, https://www.theguardian.com/technology/2009/jul/17/amazon-ki... and the kind of thing keeps happening over the years. It'll continue to happen since you aren't paying for a book. You're paying for a license to read the book for as long as the publisher/owner allows you to do so and they can revoke the permission at any time.

I still find it hilariously ironic that the first instance that was widely reported (as far as I know) was it happening to 1984.

Pay respect to Aaron Swartz, and go download whatever you need. I hear Anna's got an archive, or there is some Z Lib somewhere. If buying isn't ownership, downloading isn't stealing.