He has a blog post on the site about the approach he took.
Instead of going to Penguin to get his book published, he decided to try doing the whole process himself. That included getting translations done, coordinating printing, building a webstore, etc.
This is very true, in his about me page, he says that he does not rely on any type of cloud and hosts through his own servers. A very unique approach indeed.
Based on https://sive.rs/m and https://sive.rs/n he's self-publishing electronically for $15 (or $4 more for paperback), so I guess the costs are quite small.
Instead of going to Penguin to get his book published, he decided to try doing the whole process himself. That included getting translations done, coordinating printing, building a webstore, etc.
It's pretty cool tbh