Newbery Honor-winner Kathryn Lasky, author of the Guardians of Ga'hoole series, delivers a riveting middle grade historical fiction novel about young British spies on a secret mission in Germany in WWII. Spy sisters Alice and Louise Winfield are part of an elite unit that is unrecognizable to the common eye called the Tabula Rasa - also known as "faceless." Author - Lasky, Kathryn Number of Pages - 304 Format - Hardcover Publisher - HarperCollins Published - 2021-10-19