My first contact with entropy was in chemistry and thermodynamics and I didn't get it. Actually I didn't get anything from engineering thermodynamics books such as Çengel and so.
According to entropy, and thermodynamics in general, I can't recommend enough the notes [0] of prof. Zhigang Suo of Harvard. It's a new way of presenting thermodynamics and I finally get it... contrary to when I took a thermo course at university.
Also with gold. Some news headlines: "Turkey tightens regulation of jewellers after demand for gold soars", "Turkey's Erdogan repeats call for citizens to convert forex, gold holdings".
You must go to statistical mechanics or information theory to understand entropy. Or trying these PRICELESS NOTES from Prof. Suo: https://docs.google.com/document/d/1UMwpoDRZLlawWlL2Dz6YEomy...