How to read peoples emotions n facial expressions?

I like to read peoples emotions and understand things people do im really big into psychology and sociology that kinda thing. Is there some way to learn more of that for freeHow to read peoples emotions n facial expressions?
There are certain guides reading facial expression: look on Amazon. However, most of these books have very little substance. The true way to read people is very natural to all of us: look at the person's gestures and look at the context, and then see if any gestures are related to context. It's all very easy and congential.



However, I must insist that you discontinue using the expression, "for free". Thank you.