"The city of Ark is no longer safe. Before the rebellion, everyone could only speak List, a language of just 500 words. But when Letta became the Wordsmith, the keeper of all the words that have ever existed—she learned that being able to express yourself is what makes you human. And now, the new ruler has wicked plans to eliminate language once and for all: If a baby never hears a single word, they will never speak. Letta and the other rebels must find a way to defeat the evil for good before they lose the very thing that will set them free.