[nanny]

That's the Core reference guide. You might want the book "Programming Ruby"[1], which is linked on the documentation landing page[2]. Alternatively, for a quick overview, I recommend Learn X in Y Minutes[3].

[1]: http://ruby-doc.com/docs/ProgrammingRuby/

[2]: https://www.ruby-lang.org/en/documentation/

[3]: https://learnxinyminutes.com/docs/ruby/

[stonemetal12]

From [1] > This book documents Version 1.6 of Ruby

Has nothing about the language changed since 1.6?

[fknorangesite]

Hah yeah, uh, make sure you get a more recent edition that was published less than 20 years ago. A profound amount has changed since then.

Looks like the 5th edition covers v3.2.