I liked the Better Explained books, particularly for Calculus, as it really explained the "why" For Linear Algebra, "Linear Algebra Done Right" -- way better t

I liked the Better Explained books, particularly for Calculus, as it really explained the "why" For Linear Algebra, "Linear Algebra Done Right" -- way better than my college lin alg course. For "general mathematics", I like books that read almost like novels to really grasp the "why" of mathematics, so these are more to embellish your general understanding of "what is the point" type questions -- so things here like Euclid's Window come to mind, and "An Imaginary Tale: The story of square root minus one" will help explain complex numbers in more detail than you ever cared. Reading about the history of mathematics and the writings of some of the greats, like Rene Descartes, Lehonard Euler, Gottfried Wilhelm Leibniz, Issac Newton (the amazing thing is all these greats lived within a century of each other)