Goes beyond the popular culture depiction of Ninjas by delving into ancient Japan and uncovering the facts about this country's "invisible men" who were so feared that they were thought to have magical abilities to fly and change themselves into animals.
- Genre: Sports + Recreation, Juvenile Nonfiction
- Subgenre: Martial Arts + Self-Defense, History / Asia
- Age: 4-8 years
- Publisher: Enchanted Lion Books
- Pages: 48
- Language: English
- Format: hardcover
- Release Date: September 16, 2008
- Date Published: September 16, 2008
- Author: Stephen Turnbull
- Illustrator: James Field