Nice! However, the website is more of a digital bookshelf for Bitcoin-related books, which is useful, rather than a bookstore. Your project would matter more if you'd find a way to launch a bookstore where clients could pay with Bitcoin and another crypto. I saw the discussion and I understand that you leverage Amazon and therefore you should comply with their rules. However, anyone could go and search on Amazon for Bitcoin-related books themselves. So, if you really want the website to be more than an Amazon reseller of Bitcoin-related books, then find a way to either sell directly or resell in BTC or any other digital currency.
Good luck!