Ryk E. Spoor, is the coauthor with New York Times bestselling author Eric Flint, of the popular Threshold series of science fiction novels. Spoor's solo novels for Baen include Paradigms Lost, Grand Central Arena, and Spheres of Influence. He is also the author of epic fantasy Phoenix Rising.

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Donald Spoto is the author of more than twenty books, including bestselling biographies of Alfred Hitchcock, Tennessee Williams, Laurence Olivier, Marlene Dietrich, Ingrid Bergman, and Audrey Hepburn. He lives with his husband, Danish artist and school administrator Ole Flemming Larsen, near Copenhagen, Denmark.

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Dennis M. Spragg is the senior consultant of the Glenn Miller Archive and the American Music Research Center at the University of Colorado–Boulder. A veteran broadcasting and media research professional, he is an internationally known expert on Glenn Miller. Visit him at dennismspragg.com.

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Dr. Eric Sprankle is a professor of psychology at Minnesota State University, Mankato, and is a codirector of the sexuality studies undergraduate program. He's also a licensed clinical psychologist and an AASECT-certified sex therapist affiliated with the Minnesota Sexual Health Institute in Minneapolis.

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Taylor Spratt is the author of the Poison Penitentiary series and the Four Kings Academy series.

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Janis Abrahms Spring, PhD, is a nationally acclaimed expert on issues of trust, intimacy, and forgiveness. A bestselling and award-winning writer, she is also coauthor, with Michael Spring, of After the Affair and Life with Pop. In private practice for more than forty years, she lives in Westport, Connecticut.

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Steve Springer is a veteran journalist, award-winning sports writer, and the author of eleven books, including the New York Times bestseller American Son.

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Sally P. Springer is associate chancellor emerita at the University of California, Davis, and a psychologist with more than thirty years of experience in higher education as a professor and administrator. She has taken the college admissions journey twice with her children

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Shauna Springer, PhD, is a licensed psychologist and nationally recognized expert on initiatives that benefit the military community. Dr. Springer's work has been featured on NPR, NBC, CBS Radio, Military Times, and Marine Corps Times.

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Annie Sprinkle and Beth Stephens have been life partners and 50/50 collaborators on multimedia projects since 2002. They are authors of the Ecosex Manifesto and producers of the award-winning film Goodbye Gauley Mountain and Water Makes Us Wet.

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Preston Sprinkle is a teacher, speaker, and New York Times bestselling author. He has written several books, including People to Be Loved, Living in a Gray World, Charis, and Erasing Hell, which he coauthored with Francis Chan. Preston lives with his family in Boise, Idaho.

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