I recently bought a couple of O'Reilly books for my Kindle (I do this so I can access them while I'm away from my computer, but I generally want to access them on my PC most of the time).
I was delighted to find an upgrade offer in both books allowing me to pay you an additional $4.99 to upgrade the books to your other electronic formats! This is wonderful because my PDF reader is *much* better than the PC Kindle reader for tech books. What a wonderful idea - you can bet O'REILLY books will be my first choice going forward. Good job!
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Thank you very much for the positive feedback on our $4.99 ebook upgrade offer. We really appreciate you taking the time to write this, and have a fantastic day!
Customer Service Representative