Hi, I need to write some kind of tutorial/documentation for a programming language I created (http://marianoguerra.com.ar/efene/) and I would like to know which kind of books or tutorials are the best for you.<p>for example I like these 3:<p><pre><code> * http://learnyousomeerlang.com/
* http://learnyouahaskell.com/
* http://diveintopython.org/
</code></pre>
this tutorial will be the first documentation for the language, so I don't know if doing it informal would be good or not.<p>Also, I would like to hear some kind of examples that would be interesting to use, I don't want to write a factorial or some abstract example, but something that is usable.<p>The target of the tutorial is for people that come from mainstream languages (C/C++/C#/Java/Javascript/Python) and would like to learn a functional programming language, or want to play with erlang but don't like the syntax.<p>advices?