Samurai Seikei and Judge Ooka, his foster-father, seek seven men who have seven maps on their backs in order to locate a cache of dangerous weapons before they fall into the wrong hands.

• ISBN: 9780399246104
• Authors: Hoobler, Dorothy; Hoobler, Thomas
• Published: 2008, Philomel
• Themes: 18th century, Adventure, maps, Mystery and detective, Samurai, Secret, Tattooing
• Descriptors: Historical Fiction, Intermediate (ages 9-14), Japan, Mystery and Thriller
• No. of pages: 192