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.
- ISBN10 1306513669
- ISBN13 9781306513661
- Publish Date 1 January 2014
- Publish Status Active
- Out of Print 25 February 2015
- Publish Country US
- Imprint Sourcebooks Jabberwocky
- Format eBook
- Pages 386
- Language English