Donald R. Prothero is the author of over thirty titles in geology, paleontology, and evolutionary biology, including Weird Earth. He has taught college geology and paleontology for forty years at institutions such as Columbia University, Vassar College, Knox College, Pierce College, and Cal Poly Pomona.

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Ripley Proserpina is the author of the Searchers series and the Wishes and Curses series.

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Jim Proser is a writer and film producer. His first novel, I'm Staying with My Boys: The Heroic Life of Sgt. John Basilone, USMC, was awarded the United States Marine Corps Commandant's Recommendation in 2011.

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Francine Prose is the author of sixteen books of fiction. Her novel A Changed Man won the Dayton Literary Peace Prize. Her works of nonfiction include the highly acclaimed Anne Frank: The Book, The Life, The Afterlife, and the New York Times bestseller Reading Like a Writer. Francine Prose lives in New York City.

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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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