title_body: Two Kindles synced to same account - reading location being shared, but not Kindle content?
upvoted_answer: When you buy book from Kindle, it auto delivers the books to your chosen default device or the device you might be buying that book from. So by default you'd get the book delivered only on one device. So to get it on both devices you'd have to do it manually. Like when the "thanks" page appears you can deliver the book to your another kindle as well or from kindle you can view the book and click to download (as long as both use the same account) apart from that, kindle unlimited gives only one copy so that might not work on 2 kindles one account thing.