Thought there is an upgrade "ebook link", on "My products page" eg.
I have previously purchased: Learning Python, 4th Edition (ebook)
There is now available: Learning Python, 5th Edition, there seems to be no auto-magical method to be informed? Maybe email, dropbox text msg.
Just throwing out ideas
I'd be happy to help. On the "Your Products" page if you click on the "Upgrade Discounts" you will see a yellow button for 50% off the latest edition. I hope this helps and have a great day!
Customer Service Representative