This event is at Chantilly High School, 4201 Stringfellow Rd., Chantilly. "Geek out" at our celebration of comic books, science fiction, fantasy, TV, movies and more, featuring Gene Luen Yang, author of the Secret Coders and Avatar: The Last Airbender series. (Mr. Yang speaks at 10:30.) Books available for sale and signing. Workshops, artists, vendors, prizes, food trucks and cosplay. Family-friendly costumes encouraged. Cosponsored by the Friends of the Chantilly Regional Library. Kids, teens and adults.

No registration necessary. For more information, call 703-324-8428.