Second in this swashbuckling middle grade series following 12-year-old Dorrie Barnes' adventures as a sword-wielding ninja librarian (apprentice). Dorrie and her brother have joined the Lybrariad, a secret society of heroic librarians—their mission: save people whose words get them into trouble. But now the Lybrariad itself is in danger from an ancient evil called the Stronghold.After stumbling upon the secret society of time-traveling ninja librarians, Dorrie has finally joined Petrarch's Library as an apprentice! One day, she'll actually go on missions to rescue people whose words have gotten them into trouble. For now she's taking some interesting classes:First and Last Aid: When Nobody Else is ComingSpears, Axes, and Cats: Throwing Objects with Precision and FlairCodes, Invisible Inks, and Smoke Signals: Keeping Secrets 101But on a training mission to 1912 England, Dorrie finds herself dangerously close to a member of the Stronghold—the Library's biggest enemy. This is her opportun