Jeanine A. Penzo, LICSW, is a licensed clinical social worker with the VA Boston Healthcare System, where she utilizes dialectical behavior therapy (DBT) skills. She is a former teacher and the mother of a child with emotion dysregulation.

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Otto Penzler, proprietor of The Mysterious Bookshop in New York City, founded The Mysterious Press in 1975, now an imprint at Grove/Atlantic, and publishes classic crime fiction through MysteriousPress.com. Penzler has won two Edgar Awards, MWA's Ellery Queen Award, and the Raven Award.

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Caitlin PenzeyMoog is the grandchild of Bill and Ruth-Ann Penzey, who founded the Spice House in 1957, where Caitlin worked for most of her childhood. She studied journalism and media studies at the University of Milwaukee-Wisconsin. She is deputy managing editor of The A.V. Club. Caitlin lives in Chicago, Illinois.

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Louise Pentland is an English motherhood, beauty and lifestyle vlogger, blogger, YouTube personality and author. Her books include Life with a Sprinkle of Glitter and the bestselling Robin Wilde series. She lives in Northampton with her family.

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Derek J. Penslar is the William Lee Frost Professor of Jewish history at Harvard University in Cambridge, Massachusetts. He is the author of several books, including Theodor Herzl: The Charismatic Leader and Jews and the Military: A History.

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Roger Penrose, one the world's foremost theoretical physicists, has won numerous prizes, including the Albert Einstein Medal, for his fundamental contributions to general relativity and cosmology. He is the bestselling author, with Stephen Hawking, of The Nature of Space and Time.

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Andrea Penrose is the acclaimed author of Regency-era historical fiction, including the USA Today bestselling Wrexford & Sloane mystery series, as well as Regency romances written under the names Cara Elliott and Andrea Pickens. She can be found at andreapenrose.com.

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Ronda Racha Penrice attended the M.A. program in Southern Studies at the University of Mississippi. A veteran freelance writer, the Columbia University alum has covered Black history and culture for publications including Zora, Essence, the Atlanta Journal-Constitution, Ebony, theGrio, The Root, and NBC THINK.

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Jessica Penot, LPC-S, is a supervising licensed professional counselor in Madison, Alabama, who specializes in treating trauma and supporting autistic people. She has more than twenty years of clinical experience and is founder and director of Tree of Life Behavioral Health.

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Amy Pennza is a USA Today bestselling author of steamy paranormal and fantasy romance. After stints as a lawyer and a soldier, she discovered her dream job is writing dirty, swoony books. She lives in the Great Lakes region with her husband and five children.

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Retired Senior Warrant Officer Bob Pennington served in the Army for thirty-plus years. He's commanded Green Berets in combat and trained candidates attending the Special Forces Q-Course. Pennington has written military doctrine, as well as lectured and consulted on film, books, and military monographs.

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