(illustrations by Jun Cen /for The Washington Post)

10-10:45 Amanda Ripley is an investigative journalist for Time and the Atlantic whose work has also appeared in Slate, the Wall Street Journal and the Times of London. Her first book, “The Unthinkable: Who Survives When Disaster Strikes — and Why,” was published in 15 countries and adapted for a PBS documentary. In “The Smartest Kids in the World: And How They Got That Way,” she follows three Americans embedded for one year in the world’s new “education superpowers”: Finland, South Korea and Poland. Signing at 11.

10:55-11:40 Sally Satel is a psychiatrist and resident scholar at the American Enterprise Institute. She was an assistant professor at Yale University from 1988 to 1993, where she remains a lecturer. She is the author of many scholarly articles and books, including “Drug Treatment: The Case for Coercion” and “PC, M.D.: How Political Correctness Is Corrupting Medicine.” In “Brainwashed: The Seductive Appeal of Mindless Neuroscience,” she and her co-author, Scott O. Lilienfeld, analyze what brain scans and other neurotechnologies can and cannot tell us about ourselves. “Brainwashed” was a finalist for the 2013 Los Angeles Times Book Prize in Science. Signing at noon.

11:50-12:35 Paul Bogard is an assistant professor of English at James Madison University, where he teaches creative nonfiction. He is also editor of the anthology “Let There Be Night: Testimony on Behalf of the Dark.” His book “The End of Night: Searching for Natural Darkness in an Age of Artificial Light” describes his journey to find dark spaces around the world that best reveal starry night skies. Signing at 1.

12:45-1:30 Lynn Sherr is a broadcast journalist and author, well known as a longtime correspondent for the ABC news magazine “20/20.” Sherr has won an Emmy, two American Women in Radio and Television Commendation Awards, a Gracie Award and a George Foster Peabody Award. As a national correspondent for ABC News, she reported on the NASA space shuttle program, where she met the subject of her latest book, Sally Ride. “Sally Ride: America’s First Woman in Space” features insights from the astronaut’s family and life partner, as well as from her diaries, files and letters. Signing at 2.

1:40-2:25 Eric H. Cline is a professor of classics and anthropology at George Washington University, where he serves as departmental chair and director of the GWU Capitol Archaeological Institute. He is an active field archaeologist with 30 seasons of excavation and survey experience in places such as Israel, Egypt, Jordan, Cyprus and Greece. In “1177 B.C.: The Year Civilization Collapsed,” Cline chronicles how the civilized world of the Bronze Age came to an abrupt and cataclysmic end. Signing at 3.

2:35-3:20 Ornithologist David Sibley is the author and illustrator of “The Sibley Guide to Birds.” Sibley has received the Roger Tory Peterson Award from the American Birding Association, as well as the Linnaean Society of New York’s Eisenmann Medal. His recent second edition of “The Sibley Guide to Birds” offers a remastered version of his original, with updated information, including new and rare species as well as new paintings. The book features habitat information and voice description for every species, more tips on finding birds in the field, 700 updated maps of ranges and 85 bird-family pages cross-referenced to species accounts. Signing at 4.

3:30-4:15 Michio Kaku is a theoretical physicist, futurist and popularizer of science who appears regularly on radio and television. As co-founder of the string field theory, Kaku continues Einstein’s search for a “theory of everything,” seeking to unify the four fundamental forces of the universe: the strong force, the weak force, gravity and electromagnetism. Kaku has written several books, including “The Future of the Mind: The Scientific Quest to Understand, Enhance, and Empower the Mind,” an inside look at new developments in neuroscience and physics, investigating such ideas as the recording of memories and dreams, telepathy, consciousness and mind control. Signing at 4:30.

4:25-5:10 David Theodore George, M.D., is an associate clinical director at the National Institutes of Health in Bethesda, Md., and a clinical professor of psychiatry at the George Washington University School of Medicine. In his book “Untangling the Mind: Why We Behave the Way We Do,” George examines the role of emotions in the inner workings of the brain. He addresses how to tell the difference between a legitimate emotional reaction and a pathological one, understand the biological basis of hard-wired reactions and recognize why distress is caused by a neurological malfunction. Signing at 2:30.

5:20-6 Adrienne Mayor is a historian of ancient science and a classical folklorist. She is a research scholar in classics and the history and philosophy of science and technology at Stanford University. Her book “The Poison King: The Life and Legend of Mithradates, Rome’s Deadliest Enemy” was a finalist for the National Book Award in nonfiction. Her new book is “The Amazons: Lives and Legends of Warrior Women Across the Ancient World.” Signing at 4.