Amazon is currently running a promotion where you can get one of 70 “best-selling” Marvel graphic novels for free on Kindle with the purchase of a hardcover or paperback graphic novel. Those who partake will get a free credit automatically applied when to “click to buy eBook.”

The offer expires October 21, 2017 and is limited to one per customer account.

This is the second recent promotion Amazon has run regarding digital copies of Marvel graphic novels and trade. I twas not too long ago the company blew out digital copies with 70 to 80% off regular price bringing some down to just a few dollars (if that).