You can't buy books via Kindle Android app, but there are a few solutions
Amazon Kindle Fire redirects all Android Market requests to Amazon App Store - The Verge
Amazon Kindle - Apps on Google Play
Kumamoto, Japan - Feb 6 2020 : Kindle app, e-book reader by Amazon, on iPad in white
Amazon.com: Kindle Paperwhite Signature Edition (32 GB) – With a 6.8" display, wireless charging, and auto-adjusting front light – Without Lockscreen Ads + 3 Months Free Kindle Unlimited (with auto-renewal)- Black :
You can no longer buy Kindle eBooks on Android - Good e-Reader
Kindle For Android Hits This Summer — And You Can Buy Books In It | TechCrunch
Kindle for Android:Amazon.com:Appstore for Android
You can't buy books via Kindle Android app, but there are a few solutions
Amazon Kindle - Apps on Google Play
Kindle Store - Wikipedia
Amazon's new Kindle has compltely changed how I read | Digital Trends
How to Buy Kindle Books on iPhone & iPad (2023)
Kindle Fire HDX 7” Tablet Comes to AT&T Stores, Online for $49.99 with Fire Phone Purchase Starting October 24"
Kindle for Android:Amazon.com:Appstore for Android
Free Kindle Reading Apps for iOS, Android, Mac, and PC
Amazon Kindle Paper White 6" Display 300PPI 32 GB WIFI IPX8 2M | eBay
How to Buy Kindle Books on iPhone & iPad (2023)
Amazon.com: DOWNLOAD AND INSTALL GOOGLE PLAYSTORE APP ON KINDLE FIRE: A Step-By-Step Installation Guide For Novices And Experts, With Tips And Tricks, To Setup Play Store On New & Old Kindle Tablet:
Amazon Kindle on the App Store
Free Kindle Reading Apps for iOS, Android, Mac, and PC