Evolutionary biologist-turned-author Amber J. Keyser has a MS in zoology and a PhD in genetics. She writes both fiction and non-fiction for tweens and teens.

Her young adult novels include Pointe, Claw (Carolrhoda Lab, 2017), an explosive story about two girls claiming the territory of their own bodies, and The Way Back from Broken (Carolrhoda Lab, 2015), a heart-wrenching novel of loss and survival (and a finalist for the Oregon Book Award). She is the co-author with Kiersi Burkhart of the middle grade series Quartz Creek Ranch (Darby Creek, 2017).

Her nonfiction titles include The V-Word (Beyond Words/SimonTeen, 2016), an anthology of personal essays by women about first-time sexual experiences (Rainbow List, Amelia Bloomer list, New York Public Library Best Book for Teens and Chicago Public Library Best Nonfiction for Teens) and Sneaker Century: A History of Athletic Shoes (Twenty-First Century Books, 2015), among numerous other titles.

Her forthcoming books include Tying the Knot: A World History of Marriage (Twenty-First Century Books, 2018) and Underneath It All: The History of Women's Underwear (Twenty-First Century Books, 2018). More information at www.amberjkeyser.com. Connect with Amber on Twitter @amberjkeyser.

From Cinderella to The Bachelor and The Bachelorette reality TV shows, and from lavish destination weddings to the marriage equality movement, getting married has taken center stage in the 21st century. What purpose has the institution served across the centuries? How do proposals, ceremonies, and expectations of marriage differ across cultures? What can couples do to ensure a strong marriage, and what happens if they can't make it work? See how answers to these questions have changed across the centuries, and hear what long-term married couples have to say about the secret to their success.