Like his sleuth Jane Stuart, Evan Marshall heads his own literary agency. A former book editor and packager, he has contributed articles on writing and publishing to numerous magazines and is the author of Eye Language, The Marshall Plan for Novel Writing, and Jane Stuart & Winky Mystery: The Series.

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Dr. Rosalind K. Marshall has written seventeen books and over 150 historical articles, including biographies of Mary, Queen of Scots, John Knox, and a history of St. Giles' Cathedral. For a number of years she combined her writing career with her position as historian at the Scottish National Portrait Gallery.

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Robert Marshall is a writer and producer of more than 100 titles for TV and cinema, and the author of four books. He spent twenty years at the BBC, ran independent production companies, pioneered live screening of the performing arts, and was an executive producer for Shakespeare's Globe. He lectures at Curtin University.

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Simon Marshall, PhD, trains the brains of endurance athletes and fitness enthusiasts to become happier and more mentally resilient. He is the performance psychologist for BMC Racing, a World Tour professional cycling team.

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Daryl Marston is a colead investigator on A&E's Ghost Hunters. He has led more than 400 paranormal investigations of private homes and historical locations, such as the House of Wills. He hosts the popular podcast The American Ghost Hunter Show and co-owns the website Paranormal Warehouse, which reports on paranormal news.

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Nancy Marston was a case manager in a substance abuse group home for adolescent girls on probation and worked closely with courts, social workers, and doctors. She was a court appointed special advocate, working with children in the foster system in Los Angeles County. Nancy is a certified alcohol and drug counselor.

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Matilda Martel is a Texas girl in love with a Philly boy who loves to write dirty books about older men who fall in love with younger women and fumble their way into a filthy, funny, forever. Visit her at matildamartel.com.

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Jay Martel is the pen name of husband and wife writing team Andy Bennett and Katy Helbacka. Andy works in cybersecurity and has an MFA in creative writing from NYU and Katy is an award-winning theatrical producer, writer, actor, and director. They live in northern Minnesota. Codebreaker is their debut novel.

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Craig Martelle is the bestselling author or coauthor of numerous books, including the Darklanding, Free Trader, and End Times Alaska series. Visit him at craigmartelle.com.

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Scott Martelle, a veteran journalist and former member of the Los Angeles Times editorial board, is the author of several nonfiction books. His work has appeared in the New York Times, the Washington Post, Sierra magazine, Los Angeles magazine, Orange Coast magazine, and elsewhere.

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On the Devil's Tail is Paul Martelli's first book.

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Hannah Martian (they/she) is a writer of adult fiction. On any given day, Hannah can be found wearing one of their many different hats—youth services library assistant, substitute teacher, teaching assistant, student senator—but is always thinking about their next (very gay) novel.

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