D. Scott Hartwig was the supervisory park historian at the Gettysburg National Military Park for twenty years. He is the author of To Antietam Creek: The Maryland Campaign of September 1862.

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Barbara Hartzler is the author of the Montrose Paranormal Academy series, the story of The Seer—a.k.a. one girl with a gift to see the unseen world of angels. Not to mention the two secret societies vying for her allegiance. Montrose Paranormal Academy, Book 1: The Nexis Secret is inspired by Barbara's college experiences and peppered with anecdotes from her teen mission trip to New York City.

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Marc Hartzman is "one of America's leading connoisseurs of the bizarre" (ABCNews.com) and has written books about sideshow performers, Oliver Cromwell's head, weird things on eBay, and unorthodox messages from God. His work has also appeared in Mental Floss, Bizarre, and HuffPost/AOL Weird News.

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Adrianne Harun teaches at the Rainier Writing Workshops, an MFA program at Pacific Lutheran University, and is the author of the acclaimed short story collection The King of Limbo. She lives in Port Townsend, Washington.

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Harvard Business Review is the leading destination for smart management thinking. Through its flagship magazine, books, and digital content, Harvard Business Review provides professionals with rigorous insights and best practices to lead themselves and their organizations more effectively and to make a positive impact.

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BJ Harvey is the Amazon bestselling author of the Bliss romantic comedy series and the Lost romantic suspense series. She lives in New Zealand.

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Kristy Woodson Harvey holds a degree in journalism and mass communications from the University of North Carolina at Chapel Hill and a master's in English from East Carolina University. In addition to writing fiction, she blogs about interior design at Design Chic. She lives in North Carolina with her family.

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Ralph Harvey (1928–2020) was the head of the Order of Artemis. Harvey was a repository of witchcraft research in its purest, original form and a longtime believer in the magical fairy realm. He authored many books including Boudicca Queen of Death and British Witchcraft.

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Greg Harvey is a language scholar who has traced the roots of Tolkien's work in European folklore and pre-Christian religious beliefs. He has studied twelve languages, including Elvish, Latin, and Anglo-Saxon.

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Alyxandra Harvey lives in an old stone house in Ontario, Canada, with a few resident ghosts who are allowed to stay as long as they keep company manners. She likes chai lattes, tattoos, and books. Sometimes fueled by literary rage.

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Katherine Harvey is an honorary research fellow at Birkbeck, University of London. She holds a PhD in medieval history from King's College London and has published widely on the Middle Ages.

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David Harvey is Distinguished Professor of Anthropology at the City University of New York Graduate School, where he has taught since 2001. His course on Marx's Capital has been downloaded by over two million people since appearing online in 2008.

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