Hi. I'm actually reading it now. Can you try this link that i've extracted directly from the Amazon US app?
Revenge: Meghan, Harry and the war between the Windsors. The 'Explosive' new book from 'Britain's Top Investigative Author' https://www.amazon.com/dp/B0B6FZJ95Q/ref=cm_sw_r_apan_W1V1R69NMYV46GDGXAM8
Hope this works!
UPDATE: So I investigated further.
If you have use Amazon app using an Android phone, Google does not allow you to buy Kindle books from the app anymore.
Here's a screenshot. Look at the bottom message: https://ibb.co/WyrjjvG
When I bought it successfully, I actually used my mobile browser logged into Amazon US and that's how I purchased it.
I hope this helps.
EDIT: So, as advised, open your browser (mobile or web) and use this link: https://www.amazon.com/Revenge-Windsors-Explosive-Britains-Investigative-ebook/dp/B0B6FZJ95Q/ref=mp_s_a_1_1?crid=1XZVJN080J8EX¤cy=USD&keywords=tom+bower+revenge&qid=1658506714&s=digital-text&sprefix=tom+bower+revenge%2Caps%2C368&sr=1-1
If that fails, go to https://www.amazon.com/ebooks and search for revenge Tom bower IN YOUR BROWSER, NOT THE APP
I see the USA kindle version is out (landing page only so far) but no hard copy as yet. Amazon Au also has the kindle version out as well now and you can buy it now.
Your Kindle device should be connected to your same Amazon US account. This is a very important part. If you don't have a Kindle, it won't work or show up.
From the Amazon US app on your phone: search REVENGE TOM BOWER, it should show up with 3 options - Kindle, Audiobook and Hardbound (this one will only get delivered starting August 2nd.
From web: try this link - Revenge: Meghan, Harry and the war between the Windsors. The 'Explosive' new book from 'Britain's Top Investigative Author' https://www.amazon.com/dp/B0B6FZJ95Q/ref=cm_sw_r_apan_W1V1R69NMYV46GDGXAM8 - You should login to your Amazon US account connected to your Kindle account.
From Kindle: try updating your Kindle device to the latest version. Then search directly on the top of the device, REVENGE TOM BOWER. (You have to add the author's name if not, you'll end up with a lot of salacious novels lol). When you click on it, it should show the buy button. It will automatically downward in your Kindle device since it's now available.
I hope this helps at all. Please let me know then we'll find more ways. If you have other ebook device, I'll try and help just let me know.
Edit: added more info
That’s really strange. Perhaps the website is picking up my location (UK), but when I click on the Amazon US link it says it’s available.