James Stewart’s Calculus texts are widely renowned for their mathematical precision and accuracy, clarity of exposition, and outstanding examples and problem sets. Millions of students worldwide have explored calculus through Stewart’s trademark style, while instructors have turned to his approach time and time again.
New Ninth Editions – available now
The Ninth Metric Editions feature carefully revised content alongside the patient explanations, expertly-structured exercises and trademark focus on problem-solving that have made Stewart’s texts market-leading. The new editions are available with WebAssign – find out more
Learn about the approach the two authors take as they explore the new improvements they’ve made to Stewart Calculus whilst ensuring the accuracy and quality students and lecturers expect, continues to be maintained.
Getting to Know the New Authors of Stewart Calculus
For more than two decades, Daniel Clegg and Saleem Watson have worked with James Stewart on writing mathematics textbooks. Their collaborations have been instrumental to their work in continuing Stewart’s legacy in the Ninth Editions.
About the Authors:
- Saleem Watson is a Professor of Mathematics at California State University, Long Beach, specializing in the field of Functional Analysis. He received his Bachelor of Science degree from Andrews University in Michigan and did graduate studies at Dalhousie University and McMaster University, where he received his Ph.D. Watson co-authored the best-selling Precalculus: Mathematics for Calculus with Stewart and Redlin.
- Daniel Clegg is a Professor of Mathematics at Palomar College. He received his B.A. in Mathematics from California State University, Fullerton and his M.A. in Mathematics from UCLA. He assisted Stewart with various aspects of his calculus texts and is the co-author with Stewart of the textbook Brief Applied Calculus.

Stewart, who passed away in 2014, was a world-renowned author and mathematician publishing more than 70 textbooks over the course of his life. He received his M.S. from Stanford University and his Ph.D. from the University of Toronto. He did research at the University of London and was influenced by the famous mathematician George Polya at Stanford University. Stewart was the author of the best-selling calculus textbook series, including CALCULUS, CALCULUS: EARLY TRANSCENDENTALS and CALCULUS: CONCEPTS AND CONTEXTS, as well as a series of precalculus texts.
“In writing any mathematics textbook, you have to be aware of two people looking over your shoulders – the professor and the student. Sometimes these two people have contradictory aims and I try to balance these two points-of-view in my books. It is a delicate balance that I’m proud to have found.”
– James Stewart
Stewart Calculus – Available with
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