For students who are doing F.4 onwards for science, this is my recommendation. I keep reading Feynman's books as they all are inspirational.

As I am a fan of all universe elements, this is a simple book with a bit of calculus to bring us back to the age where modern science was still under exploration. From uni. I studied history of science and learned a lot about Copernicus, Galileo etc. That was the renaissance for science, and it was great to visit that time again.

This book brought us back to the time, where people used diagrams (Feynman's best way to explain difficult subject) and guesses to derive how the universe works. This book also gave explanation on the essence of Newton's masterpiece, Principia Mathematica.

I truly believe if we follow the footstep of the great minds, everyone could understand Mathematica, Relativity and Quantum Mechanics. It's always not the harddest part to understand it, to be able to explain to other people with easy wordings which makes Feynman so special.