Mark Yarhouse, a licensed clinical psychologist, is the Dr. Arthur P. Rech and Mrs. Jean May Rech Chair of Psychology in the School of Psychology, Counseling, and Family Therapy at Wheaton College in Wheaton, Illinois, where he leads the Sexual & Gender Identity Institute.
Olya Zaporozhets is an associate professor in the School of Psychology and Counseling at Regent University. Dr. Zaporozhets is coauthor, with Mark Yarhouse, of Costly Obedience. She has diverse clinical experiences and has trained Christian leaders in mental health counseling in Europe and Asia.
Adam Verner has narrated over one hundred books, including the AudioFile Earphones Award winner Pavilion of Women by Pearl S. Buck. Adam works as a full-time voice actor and on stage in Chicago.