This text comprises a three–text series on Calculus. The first part covers material taught in many “Calc 1” courses: limits/ derivatives/ and the basics of integration/ found in Chapters 1 through 6.1. The second text covers material often taught in “Calc 2:” integration and its applications/ along with an introduction to sequences/ series and Taylor Polynomials/ found in Chapters 5 through 8. The third text covers topics common in “Calc 3” or “multivariable calc:” parametric equations/ polar coordinates/ vector–valued functions/ and functions of more than one variable/ found in Chapters 9 through 14. More information/ including free downloads of .pdf versions of the text/ is available at www.apexcalculus.com.