The 17th annual Library of Congress National Book Festival took place September 2 at the Washington Convention Center in Washington, D.C. The event featured a lineup of more than 100 authors and speakers, including numerous children’s book and YA authors who took part in panels, storytelling activities, signings, and more. See highlights from the day’s festivities.

(From l.): Librarian of Congress Carla Hayden with Captain Underpants creator Dav Pilkey and Emma Donoghue, author of The Lotterys Plus One, at the National Book Festival gala.

Javaka Steptoe, author of the Caldecott-winning Radiant Child: The Story of Young Artist Jean-Michel Basquiat, during a story time event.

Nikki Russell (l.) and Rachel Renée Russell, collaborators on the Dork Diaries and the Misadventures of Max Crumbly series, chat with a fan at their signing.

(From l.): Abby Nolan from the Washington Post speaks with Melissa de la Cruz (Alex Eliza), Nicola Yoon (The Sun Is Also a Star), and Sandhya Menon (When Dimple Met Rishi) about love and their writing process. Photo: Random House

Sabaa Tahir, author of A Torch Against the Night, signs a book for a reader.

Meg Medina (l.), a contributor for Flying Lessons Other Stories, and Ellen Oh, editor of the anthology, snap a selfie of their panel.

(From l.): Candlewick authors Chris Van Dusen, Kate DiCamillo, and M.T. Anderson at the pre-festival gala.

Reshma Saujani, author of Girls Who Code, speaks with Rich Fahle of Book View Now on PBS-TV.

Give Me Back My Book! collaborators Ethan Long (l.) and Travis Foster lead a storytelling activity.

Carmen Agra Deedy, author of The Rooster Who Would Not Be Quiet, and a fan make faces at each other during a signing.