Title: Sword in the stacks
Description: After stumbling upon the secret society of ninja librarians who transcend time and space, Dorrie and her brother have officially become apprentices. They are determined to help the Lybrarians find a missing key that could destroy their beloved fortress, Petrarch's Library.
Subjects: Censorship, Librarians, Juvenile fiction, Secret societies, Space and time, History, Children's fiction, Librarians, fiction
Places: Great Britain
Time periods: George V, 1910-1936