Why would that be spam ? I did not ask anyone to purchase the book or alike or know the author.

The book contains an interesting concept of what is called there crypto credit money, I have not seen other currencies build in this way and I wanted to see if anyone here knows the book or the concept.
Its some type of borrowing against assets and creating a new currency with a fractional reserve just the way banks do it. I am an economist myself but not a big expert in cryptocurrencies thats why I reached out, if I posted in the wrong section then sorry, just let me know what would then be the right place.