[Math] Insightful books about elementary mathematics

booksho.history-overviewmathematics-educationtextbook-recommendation

What are some books that discuss elementary mathematical topics ('school mathematics'), like arithmetic, basic non-abstract algebra, plane & solid geometry, trigonometry, etc, in an insightful way? I'm thinking of books like Klein's Elementary Mathematics from an Advanced Standpoint and the books of the Gelfand Correspondence School – school-level books with a university ethos.

Best Answer

Geometry and the Imagination by Hilbert and Cohn-Vossen.