I am just amazed that there doesn't seem to be ANY book with ANY
in-depth info on things like mixing techniques. At my local bookstore
the audio books all hold the same basic info like "use a pop shield
when recording vocals (..)".

There are several technical audio books like the "Handbook of Sound
Engineers" (Ballou) that are good but I'm not very interested in the
technical side of the story.

So, please could anyone recommend me some books or internet articles
that holds info that goes deeper than level 1. For example, I'm
already aware that it takes more than a panpot to create a stereo
image, but detailled info on how to go about is nowhere to be found..

Thanks in advance,

Ignace

For starters here are a couple of books I found I liked:
Master Handbook of Acoustics (Alton Everest) – easy to read and
understand.
Project Studios (Philip Newell) – a good place to start.
Mastering Audio (Bob Katz) – about.. mastering. Have just started
reading, but looks interesting.
The Art of Recording (William Moylan) – this one is about ear
training, dry to read but with interesting info.