Kristen Heitzmann is the bestselling author of many novels, including The Edge of Recall and the Christy Award winner Secrets. An artist and music minister, Kristen lives in Colorado Springs, Colorado, with her husband, Jim, and their family.

See Full Bio

Lynn Helding serves as professor in vocal arts and opera and coordinator of voice pedagogy at the University of Southern California Thornton School of Music. She is in demand as a master voice teacher and popular lecturer on cognitive topics at universities, and conferences across the United States and Canada.

See Full Bio

Madelaine Francis Heleine has been involved with aquariums and fish-keeping for more than forty years. She has been a contributing writer and columnist for various magazines dealing with the aquatic world and has written several books about aquarium fish.

See Full Bio

David J. Helfand is the chair of the Department of Astronomy at Columbia University. He has also been a visiting scientist at the Danish Space Research Institute, the Sackler Distinguished Visiting Astronomer at Cambridge University, and president of the American Astronomical Society.

See Full Bio

Laurie Helgoe, PhD, is an author, educator, and clinical psychologist with a special interest in introversion and its relationship to mainstream culture. Dr. Helgoe is an assistant professor of psychology and chair of the Social Sciences Division at Davis & Elkins College in Elkins, West Virginia.

See Full Bio

Robert Hellenga is a professor emeritus at Knox College in Galesburg, Illinois, and the author of the novels The Confessions of Frances Godwin, Snakewoman of Little Egypt, The Sixteen Pleasures, The Fall of a Sparrow, Blues Lessons, Philosophy Made Simple, and The Italian Lover. He lives in Galesburg, Illinois.

See Full Bio

Erica Heller is the daughter of Joseph Heller, the author of Catch-22. An advertising copywriter, novelist, and creative consultant, her work has appeared in the New York Observer and on the Huffington Post. She lives in New York City at the ever-evolving Apthorp apartment building.

See Full Bio

Peter Heller is a seasoned adventure journalist and a senior contributor to Outside magazine.

See Full Bio

Laurence Heller, PhD, is the originator of the NeuroAffective Relational Model®, a unified approach to developmental, attachment, and shock trauma. He cofounded the Gestalt Institute of Denver and is a senior faculty member for the Somatic Experiencing Training Institute.

See Full Bio

Tania Heller is an MD and a Fellow of the American Academy of Pediatrics, educated in South Africa and trained at Georgetown. She has worked in a variety of types of medicine and has more than twenty years of experience as a doctor. She lives and practices in Bethesda, Maryland.

See Full Bio

Peter Hellman, a New York–based journalist and author, has been a contributor to Wine Spectator for more than a decade. His work has also appeared in the New York Times, the Wall Street Journal, New York magazine, and numerous other publications. His books include Chief! and When Courage Was Stronger than Fear.

See Full Bio

Chan Hellman is a professor and director of the Hope Research Center at the University of Oklahoma. He has written more than 150 scientific publications and has presented at numerous conferences worldwide. His research is focused on hope as a psychological strength helping children and adults overcome trauma and adversity.

See Full Bio