Single Variable Calculus: Concepts and Contexts
Key differences between 4th and 3rd editions
 Period between current and previous publications: 4 years (2011 vs 2007).
 The number of pages hasn't changed since the Third Edition of Stewart 's Single Variable Calculus.
 Changes and improvements in the Fourth Ed. by chapter:
 The textbook begins with four Diagnostic Tests  for Basic Algebra, Analytic Geometry, Functions, and Trigonometry (with answers).
 Chapter 2:
 Material from the former two sections 2.6 and 2.7 have been combined into a single compact section 2.6 "Derivatives and Rates of Change."
 Example 2.3.10 on Squeeze theorem (sandwich rule) has been streamlined.
 Chapter 3:
 The section 3.8 "Rates of Change in the Natural and Social Sciences" now appears later in Chapter 3 in order to incorporate more differentiation rules.
 Material on inverse trigonometric functions has been consolidated in a single new section 3.6 "Inverse Trigonometric Functions and Their Derivatives".
 Chapter 4: Two former sections 4.6 "Optimization Problems" and 4.7 "Applications to Business and Economics" have been merged into a single section, with a more concise discussion of optimization problems in business and economics.
 Chapter 6:
 New section 6.3 "Volumes by Cylindrical Shells" introduce shell integration.
 New discovery project Complementary Coffee Cups.
 Chapter 8: Former section on binomial series has been incorporated into Section 8.7 "Taylor and Maclaurin Series".
4th Edition of
Single Variable Calculus: Concepts and Contexts
eBook, 784 pages
eBook ISBN: 9781111783198
Published by: Wadsworth Publishing, February 01, 2013
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Hardcover, 784 pages
ISBN10: 0495559725
ISBN13: 9780495559726
Published by: Cengage Learning, January 07, 2009
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Hybrid (with Enhanced WebAssign with eBook LOE Printed Access Card for OneTerm Math and Science)
Paperback, 624 pages
ISBN10: 1133627153
ISBN13: 9781133627159
Published by: Cengage Learning, January 01, 2012
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3rd Edition of
Single Variable Calculus: Concepts and Contexts
Hardcover, 784 pages
ISBN10: 0534410014
ISBN13: 9780534410018
Published by: Cengage Learning, November 04, 2004
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with Tools for Enriching Calculus, Interactive Video Skillbuilder CDROM, and iLrn Homework/Personal
Hardcover, 784 pages
ISBN10: 0534410227
ISBN13: 9780534410223
Published by: Cengage Learning, November 05, 2004
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2nd Edition of
Single Variable Calculus: Concepts and Contexts
with CDROM, Make the Grade, vMentor, and InfoTrac
Hardcover, 800 pages
ISBN10: 0534434665
ISBN13: 9780534434663
Published by: Cengage Learning, December 13, 2000
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Hardcover
 Used 4th edition can save you $70.78 over the new one.

Used previous 3rd edition costs $41.22 less than the used 4th.