For the paperback I just added the cover in the usual way, I'm surprised you had a difficulty. For Kindle you would need to add an alternate cover edition.
Martin wrote: "For the paperback I just added the cover in the usual way, I'm surprised you had a difficulty. For Kindle you would need to add an alternate cover edition."
https://www.amazon.com/dp/B0D7SXBTCX print version
https://www.amazon.com/dp/B07FJVP47B ebook version
Thanks in advance