As someone who started using Mathematica only very recently, I found The Wolfram Language: Fast Introduction for Programmers [1] very helpful. It's the quickes

As someone who started using Mathematica only very recently, I found The Wolfram Language: Fast Introduction for Programmers [1] very helpful. It's the quickest way to get started with the Wolfram language if you've seen a bit of functional programming before, e.g., Python's map(F, x) is equivalent to Wolfram's Map[F, x], reduce(F, x) equivalent to Fold[F, x], etc. There's also An Elementary Introduction to the Wolfram Language by Stephen Wolfram [2,3] which is available freely as Mathematica Notebooks, although I'm yet to read it fully. [1]: https://www.wolfram.com/language/fast-introduction-for-programmers/en/ https://www.wolfram.com/language/fast-introduction-for-progr... [2]: https://www.wolfram.com/language/elementary-introduction/2nd-ed/ https://www.wolfram.com/language/elementary-introduction/2nd... [3]: https://www.wolfram.com/language/elementary-introduction/nbs/EIWL2-Notebook-Archive.zip https://www.wolfram.com/language/elementary-introduction/nbs...