In 2006 I purchased from Amazon the special edition of Vernor Vinge's "A Fire Upon the Deep", an Adobe eBook (the only way this special edition was available).

In 2006 I purchased from Amazon the special edition of Vernor Vinge's "A Fire Upon the Deep", an Adobe eBook (the only way this special edition was available). Last year, when I went to have another look at the eBook on my latest computer (not the one I originally purchased the book on), I found that it no longer worked: I could not enable the book on my new computer because Amazon's license server for Adobe eBooks no longer worked. It took me several back-and-forth emails with Amazon's customer support to get someone to admit that once Amazon moved over to the Kindle, support for the Adobe ebooks went away (most of them didn't even seem to be aware that there were eBooks prior to the Kindle). I'd have settled for them replacing my eBook with the Kindle equivalent, but I don't own a Kindle. At the time there was no Kindle eBook reader for OS X. I eventually got a refund, but it took a lot of work to get them to even recognize that there was a problem. Additionally, I didn't want a refund, I wanted to read the special content in this special version of the book, one that is not available in paper. Given that experience, I'm a bit reluctant to purchase the Kindle version, even though there is apparently an OS X reader now. I think the thing that most disturbs me about this whole incident is not just that a book I bought stopped working it is that I had no indication that it had become unavailable to me until the instant I went to re-read it. It had probably been inaccessible for months if not years without me knowing, with me thinking that I had the book ready for me to go read whenever I felt like, but when I went to check on something, it just didn't work. My shelves of paper books don't present me with that kind of problem.