The essential help you need when your calculus textbook just isn't making the grade
Homework Helpers: Calculus is a straightforward and understandable introduction to differential calculus and its applications. It covers all of the topics in a typical calculus class, including: Limits Continuity The product, quotient, and chain rules Implicit differentiation Related rates Graphical analysis Optimization
This book, from a longtime teacher with a PhD in mathematics, also contains a review of the pre-calculus concepts that form the foundation on which calculus is built.