Differential Calculus is centered on the concept of the derivative. The original motivation for the derivative was the problem of defining tangent lines to the graphs of functions and calculating the slope of such lines. Integral Calculus is motivated by the problem of defining and calculating the area of the region bounded by the graph of the functions.
Marginally better than the first part of this volume, I am interested in the topics covered in this book. The level of solved examples and back exercises is still laughable.