Gerald Corey is Professor Emeritus of Human Services and Counseling at California State University at Fullerton. He regularly teaches both undergraduate and graduate courses in group counseling and ethics in counseling. He received his doctorate in counseling from the University of Southern California. Dr. Corey is a Diplomate in Counseling Psychology, American Board of Professional Psychology; a licensed psychologist; and a National Certified Counselor. He is a Fellow of the American Psychological Association (Division 17, Counseling Psychology; and Division 49, Group Psychotherapy); a Fellow of the American Counseling Association; and a Fellow of the Association for Specialists in Group Work. He and Marianne Schneider Corey received ASGW's Eminent Career Award in 2001 and the American Mental Health Counselors Association's Lifetime Achievement Award in 2011. He received the Outstanding Professor of the Year Award from California State University at Fullerton in 1991. Dr. Corey is the author or co-author of 16 textbooks in counseling currently in print, along with more than 60 journal articles and book chapters. He has published six books with the American Counseling Association, including THE ART OF INTEGRATIVE COUNSELING, Fourth Edition (2019). Other Cengage titles he has authored or co-authored include ISSUES AND ETHICS IN THE HELPING PROFESSIONS, 10th Edition (2019), GROUPS: PROCESS AND PRACTICE, 10th Edition (2018), I NEVER KNEW I HAD A CHOICE, 11th Edition (2018), THEORY AND PRACTICE OF COUNSELING AND PSYCHOTHERAPY, 10th Edition (2017), THEORY AND PRACTICE OF GROUP COUNSELING, Ninth Edition (2016), GROUP TECHNIQUES, Fourth Edition (2015) and CASE APPROACH TO COUNSELING AND PSYCHOTHERAPY, Eighth Edition (2013). Dr. Corey also has made several educational DVD programs on various aspects of counseling practice, which are available through Cengage.

Marianne Schneider Corey is a licensed marriage and family therapist in California and a National Certified Counselor. She received her master's degree in marriage, family and child counseling from Chapman College. A Fellow of the Association for Specialists in Group Work, she and Gerald Corey received its Eminent Career Award in 2001. In 2011 they received the Lifetime Achievement Award from the American Mental Health Counselors Association, of which she is a member. She also holds memberships in the American Counseling Association, the American Group Psychotherapy Association, the Association for Specialists in Group Work, the Association for Counselor Education and Supervision, and the Western Association of Counselor Education and Supervision. In the past 40 years, she and Gerald Corey have presented workshops in group counseling for mental health professionals at universities in the U.S., Canada, Mexico, China, Hong Kong, Korea, Germany, Belgium, Scotland, England and Ireland. In addition to BECOMING A HELPER, which has been translated into Korean and Japanese, she is co-author of ISSUES AND ETHICS IN THE HELPING PROFESSIONS, 10th Edition (with Gerald Corey and Cindy Corey), which has been translated into Japanese, Chinese and Korean; GROUPS: PROCESS AND PRACTICE, 10th Edition (with Gerald Corey and Cindy Corey), which has been translated into Korean, Chinese and Polish; I NEVER KNEW I HAD A CHOICE, 11th Edition (with Gerald Corey and Michelle Muratori), which has been translated into Chinese; and GROUP TECHNIQUES, Fourth Edition (with Gerald Corey, Patrick Callanan and Michael Russell), which has been translated into Portuguese, Korean, Japanese and Czech. Along with Gerald Corey and Robert Haynes, she also created two educational video programs: "Groups in Action: Evolution and Challenges DVD and Workbook" (2014) and "Ethics in Action: DVD and Workbook" (2015).

Cindy Corey is a California licensed clinical psychologist with a private practice in San Diego, California. She worked for over a decade as a full-time Visiting Professor in the Department of Counseling and School Psychology at San Diego State University, in both the Community Based Block and Marriage and Family Therapy programs. She received her master's degree in Marriage and Family Therapy from the University of San Diego and her Doctorate (PsyD) in Multicultural Community Clinical Psychology at the California School of Professional Psychology in Alhambra, California. Dr. Corey has focused much of her work in the area of counselor education, specializing in multicultural training, social justice, and community outreach. In addition to teaching at San Diego State University, she taught part time in the PsyD program at Alliant International University in Alhambra. She has also worked as a contracted clinician for Survivors of Torture International, focusing primarily on helping Sudanese refugee youths to adjust to life in the United States, gain employment, and attend colleges and universities. Dr. Corey works as a multicultural consultant and has created clinical intervention programs, training manuals, and diversity sensitive curriculum for a variety of schools, businesses, and organizations in the San Diego area. Her private practice focuses mainly on working with women, couples, counselors, and graduate students in counseling programs.