Greg Proops is a stand-up comic from San Francisco, best known for his unpredictable appearances on Whose Line Is It Anyway?, which is back on TV on the CW network. Greg's chart-topping podcast, "The Smartest Man in the World," has been downloaded more than nine million times. Greg has also been a voice actor in Star Wars: The Phantom Menace and The Nightmare Before Christmas, and he has played Bob in Bob the Builder. He lives in Hollywood.

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Bill Pronzini is a writer of detective fiction. He is also an active anthologist, having compiled more than 100 collections, most of which focus on mystery, western, and science fiction short stories.

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Peter Pronovost, MD, PhD, is a professor at Johns Hopkins University School of Medicine and serves as medical director for the Johns Hopkins Center for Innovation in Quality Patient Care.

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Gerald J. Prokopowicz teaches American and public history at East Carolina University and is the author of All for the Regiment: The Army of the Ohio, 1861–1862.

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Roman Prokofiev is a bestselling Russian author who writes in the LitRPG, gamelit, and cyberpunk genres. His books include the Project Stellar and Rogue Merchant series.

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Christina Proenza-Coles holds a dual doctorate in sociology and history from the New School for Social Research. She has been a lifelong student of American culture and history as well as an assistant professor of the Atlantic world/African diaspora at Virginia State University from 2004 to 2011.

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Richard Proenneke (1916–2003) was a naturalist who lived alone in the high mountains of Alaska making valuable recordings of both meteorological and natural data.

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William Proctor, J.D., has written or cowritten more than eighty books, including Pain Free for Life, The Breakout Principle, and The G-Index Diet.

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Jenny Proctor loves to hike with her family and spend time outdoors, but she also adores lounging around her home, reading great books, or watching great movies and eating food she doesn't have to prepare. Jenny's romantic comedy Love at First Note was a 2016 Whitney Award Winner in the Contemporary Romance category.

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James Procter is professor of modern and contemporary literature at Newcastle University. He is the author of Dwelling Places, Stuart Hall, coeditor of Reading Across Worlds, Out of Bounds, and Postcolonial Audiences, as well as numerous articles and chapters in leading postcolonial journals and book collections.

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James O. Prochaska, PhD, led the Cancer Prevention Research Center and was professor of clinical psychology at the University of Rhode Island. As the codeveloper of the transtheoretical, or stages of change, model, he is one of the top five most cited authors in psychology.

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