If i can't ask these kind of book recommendations here please suggest another forum.

I want to understand more about Thermal metrics of PCB (Like how traces, Vias, planes etc interact thermally how they will get cooled), Heat sinks designing (like Fin structure, spacing, materials how they will affect cooling efficiency etc) How thermals flow ( i am an electrical & electronics engineer, so, If i get books which have similarities to explain thermals in electrical point of view also like heat waves to Electro magnetic waves it will be good).

I need any books which can help in understanding these flows. I will take lot of time understanding basics because i am beginner.

 

Here you go kiddo! start off with some light reading.
You'll find this equation in most component data sheets