The book was published in 2018 (see the announcement here https://news.ycombinator.com/item?id=18775349) and in 2020 I published the second edition. You can find the PDF on Leanpub at https://leanpub.com/clean-architectures-in-python.

Both the book and the website required a good amount of time to be created, so I would be very grateful if you could share the links on social media. Thanks!