From Izotope even if you don't own their products,

https://www.izotope.com/en/community/blog/tips-tutorials/2014/03/new-free-mixing-guide-now-available/

Enjoy!

Download the new guide for free:
[="http://downloads.izotope.com/guides/iZotope-Mixing-Guide-Principles-Tips-Techniques.pdf"]Download PDF[/]="http://downloads.iz…"]Download PDF[/] (8.8 MB)
[[url=http://="https://itunes.appl…"]Download eBook[/]="https://itunes.appl…"]Download eBook[/] (via iTunes for iPhone/iPad)