Regarding Principia, noted astronomer Subramanian Chandrashekhar, had written "Principia for the Common Reader", which has commentary in modern language, while

Regarding Principia, noted astronomer Subramanian Chandrashekhar, had written "Principia for the Common Reader", which has commentary in modern language, while yet using only the same geometric method that Newton used. While I have read only a small portion of it, it was very fascinating.