"At ninja competitions, athletes jump, climb, and flip their way through a twisted obstacle course. Explore the history behind the wild sport of ninja and its connection to ninja of the past"--
"Ninja of the past learned to climb, dodge, and sneak. But how do modern ninja tackle intense obstacles? This title takes a fun look at ninja training, including martial arts techniques readers can try"--
"A figure clothed in black scales a castle wall for a covert mission. But how did ninja actually live their lives? Uncover the secrets and truth of living life as a ninja"--