If I'm following your idea correctly, a prerequisite would be that we as a society would need to make it impossible to publish a book, digital or physical, without an attached NFT.
It's also worth mentioning that the OP of this comment thread promised a solution that any author could implement without Amazon's involvement, presumably because Amazon is disinterested or disincentivized to care.
No. Not necessary. You only need the verified NFT linked to “authentic” books. 3rd party service does minting and verification. It’s the same strategy luxury fashion houses are using with tagging physical products with NFTs for authentication
I do not misunderstand what an NFT is theoretically technically capable of. The problem is that your proposed idea is non-responsive to the underlying problem that fakes and counterfeits are trivial to source on Amazon.
It's also worth mentioning that the OP of this comment thread promised a solution that any author could implement without Amazon's involvement, presumably because Amazon is disinterested or disincentivized to care.