I would second the recommendation for Who is Fourier? A Mathematical Adventure. It's an unusual and engaging introduction to waves, Fourier coefficients, and transforms. The slope is gentle but not dumbed down. https://www.amazon.com/Who-Fourier-Mathematical-Adventure-2n....

My recommendation below is not the equivalent of a Feynman's series for math, but one that is pegged much lower, for someone interested in basic remedial math.

It is called "Who is Fourier: A Mathematical Adventure".

I was tremendously surprised by this unusual gem of a book. It covers the range from basic arithmetic to logarithms, trigonometry, calculus to fourier series.

https://www.amazon.com/Who-Fourier-Mathematical-Adventure-2n...

I suggest the following approach;

Start with some school textbooks for grades 8-12 i.e. Secondary Education. This is more for a refresher course in the absolute basics.

The above can be supplemented with the following books to develop intuition;

1) Who is Fourier - https://www.amazon.com/Who-Fourier-Mathematical-Adventure-2n...

2) Functions and Graphs - https://www.amazon.com/Functions-Graphs-Dover-Books-Mathemat...

After this is when you enter undergraduate studies and you have to fight the dragon of "Modern Maths" which is more abstract and conceptual. In addition to standard textbooks; i suggest the following;

1) Concepts of Modern Mathematics - https://www.amazon.com/Concepts-Modern-Mathematics-Dover-Boo...

2) Mathematics: Its Content, Methods and Meaning - https://www.amazon.com/Concepts-Modern-Mathematics-Dover-Boo...

3) Mathematical Techniques (i am linking this so you can see the reviews but get the latest edition) - https://www.amazon.com/Mathematical-Techniques-Dominic-Jorda...

Finally, if you would like to learn about all the new-fangled mathematics your best bets are;

a) The Princeton Companion to Mathematics - https://www.amazon.com/Princeton-Companion-Mathematics-Timot...

b) The Princeton Companion to Applied Mathematics - https://www.amazon.com/Princeton-Companion-Applied-Mathemati...

One important piece of advice that i have is to become comfortable with the Symbols, Notation and Formalism used in Mathematics. Most students are intimidated by the Formalism (which is nothing more than a precise form of shorthand to express abstract concepts) and give up on studying Mathematics altogether. This is a shame since it is merely the Form and not the Function of Mathematics.

This book isn't a text book, and doesn't want to be, but for Fourier Analysis, "Who is Fourier? A Mathematical Adventure" provides an introduction to the subject that, IMO, few books can match: https://www.amazon.com/Who-Fourier-Mathematical-Adventure-2n...

There's an interesting book about Fourier and his series and transform written for a general audience: "Who Is Fourier? A Mathematical Adventure" [1], by an organization called the Transnational College of LEX (which seems to have some sort of connection with Hippo Family Club[2]).

The only math assumed going in is basic high school algebra.

They also have a book on quantum mechanics ("What is Quantum Mechanics? A Physics Adventure" [3]) and biology ("What is DNA? A Biology Adventure"[4]).

[1] https://www.amazon.com/Who-Fourier-Mathematical-Adventure-2n...

[2] https://en.wikipedia.org/wiki/Hippo_Family_Club#Transnationa...

[3] https://www.amazon.com/What-Quantum-Mechanics-Physics-Advent...

[4] https://www.amazon.com/What-Biology-Adventure-Transnational-...

I can personally strongly recommend the book, "Who is Fourier?" for learning math: http://www.amazon.com/Who-Fourier-Mathematical-Adventure-Edi.... It is the best math book I have ever read.

I had to overcome my school-age brainwashing in order to enjoy math. One book that helped me was "Who is Fourier? A Mathematical Adventure" (http://www.amazon.com/ho-Fourier-Mathematical-Adventure-Edit...). I highly recommend it for those looking to find enjoyment in math.