Calculus teachers who believe that the majority of calculus textbooks are too lengthy will find this book useful. When James Stewart set out to write the book, he posed the following question to himself: What are the most important aspects of a calculus curriculum for scientists and engineers that spans three semesters? ESSENTIAL CALCULUS, Second Edition provides a condensed method for teaching calculus that focuses on major concepts and backs up those concepts with precise definitions, patient explanations, and carefully graded problems. This method was developed by the authors of the first edition of the book. The book is only 900 pages long, which is two-thirds the size of Stewart's other calculus texts; however, it covers almost all of the same subjects as those other books. This relatively short length was accomplished primarily by the author's decision to condense the exposition and by his decision to place some of the book's features on the website associated with the book (www.StewartCalculus.com). Despite its smaller size, the book has a contemporary feel to it. It discusses technology and includes material to promote conceptual understanding, although these aspects do not feature as prominently as they do in Stewart's other books. The same attention to detail, eye for innovation, and meticulous accuracy that have made Stewart's textbooks the best-selling calculus texts in the world are featured in ESSENTIAL CALCULUS.