Allen C. Guelzo is Henry R. Luce Professor of the Civil War Era and Director of Civil War Era Studies at Gettysburg College. Three-time winner of the Lincoln Prize, he is the author of several books, including Abraham Lincoln: Redeemer President and Lincoln's Emancipation Proclamation: The End of Slavery in America.

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Margaret Guenther served as emeritus professor at General Theological Seminary in New York City, where she taught ascetical theology. She was also the director of the Center for Christian Spirituality, a pioneering program for the training of spiritual directors. She passed away in 2016.

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David A. Guenther is an Emeritus Professor at the University of Oregon. He has taught for over thirty years and authored many award-winning journal articles. A veteran of the United States Marine Corps, he lives in the Pacific Northwest with his wife.

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Heather Guerre writes sexy-sweet fantasy, sci-fi, and contemporary romances. A hopeless romantic and an unapologetic nerd, Heather loves everything to do with romance, aliens, shifters, cyborgs, fantasy monsters, alternate worlds, magic, and outer space.

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Alexander Guerrero is professor of philosophy at Rutgers University-New Brunswick. He writes about topics in moral philosophy, political philosophy, legal philosophy, and issues in epistemology that intersect with those areas. He is editor-in-chief of Philosophy Compass and an associate editor of Ethics.

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Tim Guest writes for the Guardian and the Daily Telegraph. He lives in London.

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Olivier Guez is the author of several books, including L'Impossible retour: A History of Jews in Germany since 1945, Praise of Dodging, and The Revolutions of Jacques Koskas. In 2016, he received the German Best Screenplay Award for the film Fritz Bauer, A German Hero.

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Russell A. Gugeler is the author or coauthor of several military history studies, including Combat Actions in Korea. He served in the U.S. Army during World War II.

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Bill Guggenheim has been conducting After-Death Communication (ADC) research since 1988, and is the coauthor, with Judy Guggenheim, of Hello from Heaven!.

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Judy Guggenheim has been conducting After-Death-Communication (ADC) research since 1988, and is the coauthor, with Bill Guggenheim, of Hello from Heaven!.

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Guy Gugliotta is the author of Freedom's Cap and coeditor of Swift Boats at War in Vietnam.

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Dr. Ahona Guha is a clinical and forensic psychologist, and a survivor with lived experience of complex trauma. She works with victims of abuse and trauma, and clients with a range of other difficulties such as anxiety, depression, perfectionism, burn-out, and relationship problems.

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