Jim Stewart's Single Variable Calculus has become the most widely adopted text for the first segment of the calculus course. Why? Stewart writes with integrity and precision, reaching out to students with a clarity and a love for the subject matter that is apparent on every page. From a mathematical standpoint, the text is deemed impeccable; from a pedagogical standpoint, insightful; from an accuracy standpoint, remarkable. On every page of his text, Stewart's genuine understanding of both calculus and calculus students is apparent. A phenomenon of the Stewart success is the text's use in such a wide variety of colleges and universities throughout the world. How does Stewart reach students at every level so effectively? Just as he teaches to every student in his classes from the most unprepared to the most mathematically gifted, Stewart write to this range of students--adding the explanations that make ideas come alive as well as the problems that challenge.