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We would like to thank all our colleagues at Bedford/St. Martin’s: President Denise Wydra, Publisher Erika Gutierrez, Marketing Manager Stacey Propps, Managing Editor Shuli Traub, Senior Project Editor Harold Chester, Senior Production Supervisor Jennifer Peterson, and Senior New Media Editor Tom Kane—we are truly grateful for your knowledge, creativity, expertise, and hard work throughout this process. We are especially grateful for the many contributions of our editor, Mae Klinger, who expertly guided us through every step of this revision.

Thanks to all the instructors who participated in reviews for the fourth edition: Sharee Broussard, Spring Hill College;Glen F. Byne, Boston University; Michael S. Carr, Cleveland State Community College; Carolyn Clark, Salt Lake Community College; Elaine Vander Clute, Wor-Wic Community College; Sarah Lynn Mohundro Contreras, Del Mar College;Kristopher Copeland, Northeastern State University;Donna Craine, Front Range Community College; Gabrielle Cuan, Valencia Community College–Osceola Campus; Oscar Cuan, Valencia Community College–Osceola Campus; Patricia Gowland, University of Illinois at Chicago; Lynette Jachowicz, Metropolitan Community College–Maple Woods; Nancy Jennings, Cuyamaca College; Debra S. Jones, Chattanooga State Community College; A’Isha Malone, Tarrant County College–Northwest Campus; Jodie D. Mandel, College of Southern Nevada; William Maze, Northwest Mississippi Community College; Brad Mello, George Washington University; Thomas A. Nelson, Elon University; Heidi Ochoa, Saddleback College; Mary Haslerud Opp, University of North Dakota; Diana Rehling, St. Cloud State University; Clifford J. Ruth, Riverside City College; Sudeshna Roy, Stephen F. Austin State University; Brian Simmons, University of Portland; Amy M. Smith, Salem State University; Jason Stone, Oklahoma State University–Oklahoma City; Barbara Tarter, Marshall University; Gretchen Aggertt Weber, Horry-Georgetown Technical College; Dennis Wemm, Glenville State College; Arnold Wood Jr., Florida State College at Jacksonville; Thomas S. Wright, Temple University.