I have just the book for you :-) Buy yourself a copy of; Who Is Fourier?: A Mathematical Adventure (any edition will do) and study it. Check reviews on Amazon

I have just the book for you :-) Buy yourself a copy of; Who Is Fourier?: A Mathematical Adventure (any edition will do) and study it. Check reviews on Amazon and elsewhere. This is a great book written in Manga style which is highly approachable.