10:30 A.M. Mary Ann Hoberman, the U.S. children's poet laureate, reads from and discusses the new picture book "The Tree That Time Built: A Celebration of Nature, Science, and Imagination" (with poems selected by Hoberman and Linda Winston, and illustrated by Barbara Fortin), at Politics and Prose Bookstore, 5015 Connecticut Ave. NW, 202-364-1919.
12:30 P.M. British writer and broadcaster Mark Ovenden discusses his new illustrated book, "Paris Underground: The Maps, Stations, and Design of the Metro," at Borders Books-Downtown, 18th & L Sts. NW, 202-466-4999.
6:45 P.M. Niall Ferguson, a professor of history at Harvard University and a contributing editor to the Financial Times, discusses his book "The Ascent of Money: A Financial History of the World" as part of the Smithsonian Resident Associate Program at the S. Dillon Ripley Center, 1100 Jefferson Dr. SW. A book signing follows. Tickets are $25 for nonmembers (tickets for full-time students and faculty are $10, with ID checked at the door); call 202-633-3030 or visit www.smithsonianassociates.org.
7 P.M. Woody Holton, the author of "Unruly Americans and the Origins of the Constitution" (a finalist for a National Book Award), discusses and signs his new book, "Abigail Adams," in a program hosted by the Society of the Cincinnati and held at Anderson House, 2118 Massachusetts Ave. NW. Admission is free; call 202-785-2040 or visit www.societyofthecincinnati.org for details.
7 P.M. Journalist Timothy Egan discusses and signs "The Big Burn: Teddy Roosevelt and the Fire that Saved America" at Politics and Prose Bookstore, 202-364-1919.
7 P.M. The Open Society (Baltimore) is sponsoring a discussion with Beverly Daniel Tatum, the president of Spelman College and the author of "Can We Talk about Race?: And Other Conversations in an Era of School Resegregation," and David W. Hornbeck, the former superintendent of Philadelphia schools and the author of "Choosing Excellence in Public Schools: Where There's a Will, There's a Way," at the Enoch Pratt Free Library, Central Branch, Wheeler Auditorium, 400 Cathedral St., Baltimore, Md., 410-396-9454.
7 P.M. Mitch Albom, author of the bestselling "Tuesdays with Morrie," reads from and signs his new inspirational book, "Have a Little Faith: A True Story," at the Sixth & I Historic Synagogue, 600 "Eye" St. NW. Tickets are $10 each, or one free with purchase of the book. Call 202-408-3100 for details; visit www.sixthandi.org to RSVP.
7:30 P.M. "New New York Novels" is the theme of a PEN/Faulkner evening with readings by Stacey D'Erasmo, author of "The Sky Below," and Jonathan Lethem, author of "Chronic City," at the Folger Shakespeare Library, 201 East Capitol St. SE. A reception and book signing follow. Tickets are $15; call 202-544-7077 or visit www.folger.edu/penfaulkner to RSVP.
7:30 P.M. Sara Engram and Katie Luber, cofounders of the Baltimore-based the Seasoned Palate, discuss and sign their new book, "The Spice Kitchen: Everyday Cooking with Organic Spices," at Borders Books-Timonium, 170 West Ridgely Rd., Timonium, Md., 410-453-0727.
7:30 P.M. Audrey Niffenegger, author of the bestselling novel "The Time Traveler's Wife" (the inspiration for the recent feature film), reads from and signs her new novel, "Her Fearful Symmetry," at Borders Books-Baileys Crossroads, Route 7 at Columbia Pike, Baileys Crossroads, Va., 703-998-0404.
10:30 A.M. Children's author Mary Amato reads from and discusses her newest book, "Take the Mummy and Run: The Riot Brothers Are on a Roll" (illustrated by Ethan Long, ages 9-12) at Politics and Prose Bookstore, 202-364-1919.
Noon. Broadcast journalist and documentary filmmaker Lynne Joiner discusses and signs "Honorable Survivor: Mao's China, McCarthy's America and the Persecution of John S. Service" at the National Archives, Jefferson Room, 700 Pennsylvania Ave. NW, 202-357-5000.
7 P.M. Dan Senor, an adjunct senior fellow for Middle East Studies at the Council on Foreign Relations, discusses his new book, "Start-up Nation: The Story of Israel's Economic Miracle" (written with Saul Singer, editorial editor of the Jerusalem Post), at the Sixth & I Historic Synagogue, 600 "Eye" St. NW. Tickets are $6 each, or two free with purchase of the book. Call 202-408-3100 for details; visit www.sixthandi.org to RSVP.
7 P.M. Michael Specter, a staff writer at the New Yorker magazine, discusses and signs "Denialism: How Irrational Thinking Hinders Scientific Progress, Harms the Planet, and Threatens Our Lives" at Politics and Prose Bookstore, 202-364-1919.
7 P.M. Christine Sullivan discusses and signs "Saving Cinnamon: The Amazing True Story of a Missing Military Puppy and the Desperate Mission to Bring Her Home," chronicling the tale of Navy reservist Mark Feffer and the puppy he adopted in Baghdad, at Barnes & Noble-Annapolis Harbour Center, 2516 Solomon's Island Rd., Annapolis, Md., 410-573-1115.