"Ava thought her job as a librarian at the Library of Congress would mean a quiet, routine existence. But an unexpected offer from the US military has brought her to Lisbon with a new mission: posing as a librarian while working undercover as a spy gathering intelligence. Meanwhile, in occupied France, Elaine has begun an apprenticeship at a printing press run by members of the Resistance. It's a job usually reserved for men, but in the war, those...

Presents information on the printing press, including its invention, history, how it works, and how it has affected people's lives.

Describes the first printing press, the printing press's impact on ordinary people's lives, printing press improvements made during the nineteenth and twentieth centuries, the parts of a modern press, writing and printing surfaces throughout history, and digital printing.

Learn about one of the most important inventions in history.