Alongside Night is one of my favorite books on the subject of alternative economies. The author, J. Neil Schulman, describes how such an economy would have manifest before the Internet. It was written before darknet technologies, thus it's actually a great way to visualize what darknets really are: pure agorism.
Agorism
"The goal of agorism is the agora. The society of the open marketplace as near to untainted by theft, assault, and fraud as can be humanly attained is as close to a free society as can be achieved. And a free society is the only one in which each and every one of us can satisfy his or her subjective values without crushing others’ values by violence and coercion.”
- Samuel Edward Konkin III
Blockchain technologies are the economic bridge between all kinds of economies. So if you read Alongside Night, the use of gold stands in for blockchains.
Note: Despite of Schulman's best efforts, the movie is just pathetic and dumb. Just read the book instead.
Anyone can download a PDF edition of Alongside Night for free at alongsidenight.net.