• A crowd gathers and listens to a speaker at the 2018 National Book Festival. Photo credit: Claire Gardiner

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  A crowd gathers and listens to a speaker at the 2018 National Book Festival. Photo credit: Claire Gardiner

• A young girl uses a microphone to a question at the 2018 National Book Festival. Photo credit: Claire Gardiner

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  A young girl uses a microphone to a question at the 2018 National Book Festival. Photo credit: Claire Gardiner

• A young reader participates in the 2018 National Book Festival book signings. Photo credit: Claire Gardiner

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  A young reader participates in the 2018 National Book Festival book signings. Photo credit: Claire Gardiner

• Author Sujatha Gidla participates in the 2018 National Book Festival book signings. Photo credit: Claire Gardiner

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  Author Sujatha Gidla participates in the 2018 National Book Festival book signings. Photo credit: Claire Gardiner

• A presenter and her service dog onstage at the 2018 National Book Festival. Photo credit: Claire Gardiner

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  A presenter and her service dog onstage at the 2018 National Book Festival. Photo credit: Claire Gardiner

• A presenter and her service dog onstage at the 2018 National Book Festival. Photo credit: Claire Gardiner

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  A presenter and her service dog onstage at the 2018 National Book Festival. Photo credit: Claire Gardiner

• A 2018 National Book Festival volunteer interacts with a little girl. Photo credit: Claire Gardiner

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  A 2018 National Book Festival volunteer interacts with a little girl. Photo credit: Claire Gardiner

• A happy young reader walks by an inflatable Dav Pilkey character at the 2018 National Book Festival. Photo credit: David Rice

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  A happy young reader walks by an inflatable Dav Pilkey character at the 2018 National Book Festival. Photo credit: David Rice

• A group of boys pose with Captain Underpants at the 2018 National Book Festival. Photo credit: David Rice

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  A group of boys pose with Captain Underpants at the 2018 National Book Festival. Photo credit: David Rice

• A 2018 National Book Festival volunteer reads a picture book aloud. Photo credit: David Rice

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  A 2018 National Book Festival volunteer reads a picture book aloud. Photo credit: David Rice

• A group of boys interacts with a 2018 National Book Festival volunteer. Photo credit: David Rice

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  A group of boys interacts with a 2018 National Book Festival volunteer. Photo credit: David Rice

• A family points to something on a page at the 2018 National Book Festival. Photo credit: David Rice

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  A family points to something on a page at the 2018 National Book Festival. Photo credit: David Rice

• A young reader interacts with a 2018 National Book Festival volunteer. Photo credit: David Rice

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  A young reader interacts with a 2018 National Book Festival volunteer. Photo credit: David Rice

• A boy sits in front of a camera at the 2018 National Book Festival. Photo credit: David Rice

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  A boy sits in front of a camera at the 2018 National Book Festival. Photo credit: David Rice

• Author David Ezra Stein presents at the 2018 National Book Festival. Photo credit: David Rice

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  Author David Ezra Stein presents at the 2018 National Book Festival. Photo credit: David Rice

• Crowds gather en masse at the 2018 National Book Festival. Photo credit: David Rice

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  Crowds gather en masse at the 2018 National Book Festival. Photo credit: David Rice

• Author Matt de la Pena presents at the 2018 National Book Festival. Photo credit: David Rice

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  Author Matt de la Pena presents at the 2018 National Book Festival. Photo credit: David Rice

• Librarian of Congress Dr. Carla Hayden interviews National Ambassador for Young People's Literature Jacqueline Woodson at the 2018 National Book Festival. Photo credit: David Rice

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  Librarian of Congress Dr. Carla Hayden interviews National Ambassador for Young People's Literature Jacqueline Woodson at the 2018 National Book Festival. Photo credit: David Rice

• Author Russell Ginns presents at the 2018 National Book Festival. Photo credit: David Rice

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  Author Russell Ginns presents at the 2018 National Book Festival. Photo credit: David Rice

• A 2018 National Book Festival volunteer helps a festival attendee. Photo credit: David Rice

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  A 2018 National Book Festival volunteer helps a festival attendee. Photo credit: David Rice

• A group of girls get creative at an interactive table at the 2018 National Book Festival. Photo credit: David Rice

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  A group of girls get creative at an interactive table at the 2018 National Book Festival. Photo credit: David Rice

• Two boys put together a 2018 National Book Festival-themed puzzle. Photo credit: David Rice

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  Two boys put together a 2018 National Book Festival-themed puzzle. Photo credit: David Rice

• A 2018 festivalgoer sits on the ground surrounded by books and reads. Photo credit: David Rice

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  A 2018 festivalgoer sits on the ground surrounded by books and reads. Photo credit: David Rice

• Author and illustrator Brian Selznick presents at the 2018 National Book Festival. Photo credit: David Rice

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  Author and illustrator Brian Selznick presents at the 2018 National Book Festival. Photo credit: David Rice

• A group of 2018 National Book Festival volunteers smiles for the camera. Photo credit: Kimberly Powell

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  A group of 2018 National Book Festival volunteers smiles for the camera. Photo credit: Kimberly Powell

• A mother and daughter attending the 2018 National Book Festival pose for a photo together. Photo credit: Kimberly Powell

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  A mother and daughter attending the 2018 National Book Festival pose for a photo together. Photo credit: Kimberly Powell

• Author Robin Benway presents at the 2018 National Book Festival. Photo credit: Kimberly Powell

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  Author Robin Benway presents at the 2018 National Book Festival. Photo credit: Kimberly Powell

• Author David Levithan presents at the 2018 National Book Festival. Photo credit: Kimberly Powell

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  Author David Levithan presents at the 2018 National Book Festival. Photo credit: Kimberly Powell

• Author Sujatha Gidla is interviewed at the 2018 National Book Festival. Photo credit: Kimberly Powell

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  Author Sujatha Gidla is interviewed at the 2018 National Book Festival. Photo credit: Kimberly Powell

• Library of Congress Chief Communications Officer Roswell Encina smiles onstage at the 2018 National Book Festival. Photo credit: Kimberly Powell

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  Library of Congress Chief Communications Officer Roswell Encina smiles onstage at the 2018 National Book Festival. Photo credit: Kimberly Powell

• The entrance to the 2018 National Book Festival bustles as masses of people enter and exit the festival. Photo credit: Shawn Miller

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  The entrance to the 2018 National Book Festival bustles as masses of people enter and exit the festival. Photo credit: Shawn Miller

• Two 2018 National Book Festival volunteers laugh as they roll posters together. Photo credit: Shawn Miller

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  Two 2018 National Book Festival volunteers laugh as they roll posters together. Photo credit: Shawn Miller

• 2018 National Book Festival attendees check out information about the festival. Photo credit: Shawn Miller

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  2018 National Book Festival attendees check out information about the festival. Photo credit: Shawn Miller

• 2018 National Book Festival guests purchase books from the sales at the festival. Photo credit: Shawn Miller

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  2018 National Book Festival guests purchase books from the sales at the festival. Photo credit: Shawn Miller

• Librarian of Congress Dr. Carla Hayden awards author Annie Proulx with the Library of Congress Prize for American Fiction at the 2018 National Book Festival. Photo credit: Shawn Miller

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  Librarian of Congress Dr. Carla Hayden awards author Annie Proulx with the Library of Congress Prize for American Fiction at the 2018 National Book Festival. Photo credit: Shawn Miller

• A panel takes the stage at the 2018 National Book Festival. Photo credit: Shawn Miller

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  A panel takes the stage at the 2018 National Book Festival. Photo credit: Shawn Miller

• Librarian of Congress Dr. Carla Hayden welcomes author and United States Supreme Court Justice Sonia Sotomayor to the stage. Photo credit: Shawn Miller

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  Librarian of Congress Dr. Carla Hayden welcomes author and United States Supreme Court Justice Sonia Sotomayor to the stage. Photo credit: Shawn Miller

• Author and United States Supreme Court Justice Sonia Sotomayor presents her book "Turning Pages: My Life Story" at the 2018 National Book Festival. Photo credit: Shawn Miller

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  Author and United States Supreme Court Justice Sonia Sotomayor presents her book "Turning Pages: My Life Story" at the 2018 National Book Festival. Photo credit: Shawn Miller

• Author and United States Supreme Court Justice Sonia Sotomayor hugs a young fan in the crowd at the 2018 National Book Festival. Photo credit: Shawn Miller

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  Author and United States Supreme Court Justice Sonia Sotomayor hugs a young fan in the crowd at the 2018 National Book Festival. Photo credit: Shawn Miller

• Author and United States Supreme Court Justice Sonia Sotomayor hugs a young fan in the crowd at the 2018 National Book Festival. Photo credit: Shawn Miller

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  Author and United States Supreme Court Justice Sonia Sotomayor hugs a young fan in the crowd at the 2018 National Book Festival. Photo credit: Shawn Miller

• A girl sits on a rocking horse while she listens to a storyteller at the 2018 National Book Festival. Photo credit: Shawn Miller

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  A girl sits on a rocking horse while she listens to a storyteller at the 2018 National Book Festival. Photo credit: Shawn Miller

• A large group of children gather around the storytelling stage at the 2018 National Book Festival to hear Librarian of Congress Dr. Carla Hayden tell a story. Photo credit: Shawn Miller

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  A large group of children gather around the storytelling stage at the 2018 National Book Festival to hear Librarian of Congress Dr. Carla Hayden tell a story. Photo credit: Shawn Miller

• Librarian of Congress Dr. Carla Hayden poses for a Harry Potter-themed photo with a young reader. Photo credit: Shawn Miller

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  Librarian of Congress Dr. Carla Hayden poses for a Harry Potter-themed photo with a young reader. Photo credit: Shawn Miller

• Librarian of Congress Dr. Carla Hayden poses for a  photo with two young readers and Clifford the Big Red Dog. Photo credit: Shawn Miller

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  Librarian of Congress Dr. Carla Hayden poses for a  photo with two young readers and Clifford the Big Red Dog. Photo credit: Shawn Miller

• Authors Alfredo Corchado and Francisco Cantu have a conversation onstage at the 2018 National Book Festival. Photo credit: Shawn Miller

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  Authors Alfredo Corchado and Francisco Cantu have a conversation onstage at the 2018 National Book Festival. Photo credit: Shawn Miller

• A family interacts with a vendor on the floor of the 2019 NBF. Photo credit: David Critics

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  A family interacts with a vendor on the floor of the 2019 NBF. Photo credit: David Critics