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I wrote and self-published a #book .
Please check it out, and get it for now, here: https://github.com/manuelcaeiro/mybook-vol.1
I would not advise you to go there for the book because those are the not revised drafts, and I do not have the time to upload the corrected version. If you like the theme, consider buying the book. The link is on my pinned post.