Today is, at least according to Kindle US, Tolkien Reading Day, and they have a selection of 19 Tolkien books on sale for today only. I spot checked, and many, perhaps all, are also on sale at Kobo US…
Here’s the link to the Kindle US page, and unfortunately I’m in a huge time-crunch right now, so you’ll have to look at Kobo yourself 😒.
Find the Kindle US sale page here.