Thompson, Silvanus P.; Gardner, Martin

Calculus Made Easy : Being a Very-Simplest Introduction to Those Beautiful Methods of Reckoning Which Are Generally Called by the Terrifying Names of the Differential calc

A new version of this classic math primer explains the timeless theories of calculus in a contemporary and comprehensible way, with updated method and terminology, and twenty new recreational problems for practice and enjoyment. 20,000 first printing.