In my opinion, there cannot be a good reason for pulling books that you bought, ever.
Imagine that happening to dead-tree books, someone shows up on your doorstep to reclaim the book 'because it violates copyright'. You'd tell them to bugger off, and it's no different in this case.
Once you bought a book, digital or analog, it should stay in your possession for as long as you want.
Imagine that happening to dead-tree books, someone shows up on your doorstep to reclaim the book 'because it violates copyright'. You'd tell them to bugger off, and it's no different in this case.
Once you bought a book, digital or analog, it should stay in your possession for as long as you want.