I told you I could get audible books. Are you suggesting I can get get any new book of kindles in audible form no matter how technical or obscure from one of these sites -that would certainly help but I would have thought it uneconomic for Amazon. I need technical books on cell biology, immunology, etc.
I have seen on line hat there are ways to convert Kindle books to mp3 files which can then be read. However I suspect that such techniques may be technically illegal so I quite understand that you would not recommend them. I really hoped there might be legal ways of doing it but obviously not. It seems likely that I will simply give up on amazon and use ebooks in future because there seems to be no problem in converting g them to mp3 files. Thank you for your efforts. It would be churlish to grumble at your inability to solve my problem.