First of all, I want to say very big THANK YOU for all who contribute to various libre, open source etc. projects. I'm so happy that people love sharing knowledge, skills and fruits of their work.

But to the topic - how do you find time for it?
Whenever I update my Debian or Axpos or any other libre software I see soooo many updates/changes made by (probably soooo many) people. And I always ask myself a question - when did they do that? Where have they found time for contributing? For me full time work makes me so tired that it's the last thing I think about after work hours. Especially in the office job, after x hours of sitting before my monitor I truly hate every next minute after work. I would love to contribute some code, I would realllly love to. Sometimes I find some bugs and try to report them and that's all I am able to do. What frustrates me the most is that I have abilities to code because it's my daily job, but I don't have energy to do that.

So, could you tell me how do you find time and energy to contribute to libre projects?

Project Gutenberg is a great resource for free books, but its 50,000+ titles are intimidating in number (if not outright impenetrable). The same goes for other free ebook aggregators/feeds, of which there are many. There are also lots of authors who offer up their books for free. And, of course, there are tons of free options available in, say, the Kindle store. While it's nice to have so many choices, it hinders discoverability. Individual books get lost in all the noise.

As such, I'd like to know: what are some standout, recommended books that are available to readers for free?

Obvious disclaimer: I am not interested in pirated content.