This book is for math teachers and professors who need a handy calculus reference book, for college students who need to master the essential calculus concepts and skills, and for AP Calculus students who want to pass the exam with a perfect score. Calculus can not be made easy, but it can be made simple. This book is concise, but the scope of the contents is not. To solve calculus problems, you need strong math skills. The only way to build these skills is through practice. To practice, you need this book.