Right now at Amazon, you can get a $5 Kindle eBook credit when you purchase an eBook with Alexa! You don’t have to have a Kindle; the Kindle App will work just fine. You do have to order with Alexa on an Echo device, though, instead of online or in the Amazon app. This offer does not apply to preorders, physical goods, digital magazines, print books or audiobooks.
As long as you complete your purchase by December 31, 2022, you will receive the credit.