Joaquín Rivaya-Martínez is associate professor of history at Texas State University. He has authored numerous essays on Comanche history and the U.S.-Mexico borderlands.

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Manuel Rivas is an award-winning Galician writer, poet, screenwriter, and journalist, and considered a revolutionary in contemporary Galician literature. He began his writing career at the age of fifteen, and has since published numerous anthologies of poetry, novels, collected essays, and news articles.

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Caryn Rivadeneira is the acclaimed author of seventeen books for children and adults, including the multi-award-winning Helper Hounds series. She is a member of INK: A Creative Collective and the Society of Children's Book Writers and Illustrators.

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Maria Riva was born in Berlin in 1924 and is the only child of Marlene Dietrich. Riva performed in Germany and Italy as part of a USO troupe during World War II and taught acting at Fordham University. Riva has performed on Broadway, radio, television, and film and has been nominated for an Emmy.

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Paul Ritvo, PhD, is a professor at York University in Ontario, Canada. He's also a research scientist at Cancer Care Ontario and a psychologist with over twenty-five years' experience in the development and evaluation of evidence-based cognitive behavioral programming for healthy lifestyle behavior change.

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Christiane Ritter was an Austrian activist and author. She wrote A Woman in the Polar Night on her return to Austria from Spitsbergen in 1934. It has since become a classic of travel writing, never going out of print in German and being translated into seven other languages. She died in 2000 at the age of 103.

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Trevor Ritland is an adjunct instructor in the Creative Media & Film program at Northern Arizona University and is the documentarian of "El Dorado: The Search for the Golden Toad" along with other projects exploring imperiled species and environmental mysteries.

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Kyle Ritland earned his MFA in creative writing at the University of California, Riverside while working as a freelance environmental journalist, chasing stories of island foxes, desert birds, and big cats. He lives in the American Northeast with his wife Alannah and their two cats, Hazel and Fiver.

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Mike Ritland is the New York Times bestselling author of Trident K9 Warriors. A former Navy SEAL, he started his own company to train dogs for the SEAL teams, as well as for the U.S. government and many other clients. He also founded the Warrior Dog Foundation to help retired Special Operations dogs live long and happy lives after their service.

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Kyle J. Ritchie facilitates the high-performance, sustainable design process for Ayers Saint Gross in their Baltimore and DC offices. He travels nationally to speak on sustainability-related issues.

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Adam Ritchie advocates for public relations to evolve from its past as an organization's mouthpiece to its future as a creative engine. He has won every award in the industry multiple times, presented at dozens of conferences, and spoken at more than fifty universities on the topic of his book, Invention in PR.

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Donald A. Ritchie is Historian Emeritus of the US Senate. A former president of the Oral History Association, he also served on the council of the American Historical Association and as a delegate to the American Council of Learned Societies.

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