The magic tree house takes Jack and Annie back in time to feudal Japan where the siblings learn about the ways of the Ninja.

Ninjas Kai, Cole, Jay, and Zane are captured and must battle a mysterious masked samurai.

"Eleven-year-old Rena suffers from social anxiety disorder. It keeps her from engaging at school, hanging out with her best friend in person, or participating in any sort of group activity. But when, on a dare, she enrolls in a fake-sounding 'school for ninjas,' she quickly learns it's no joke! Immediately, Rena's caught up in an ancient prophecy--that she will become the ninja master known as 'The Ghost'! Assuming she can conquer her own anxieties,...

Cole, a member of Sensei Wu's team of ninja warriors, must keep his fellow ninjas' egos in check as he strives to unite the warriors and lead them on their dangerous missions.

As Naruto continues to try to pass the exams necessary to attain the next level of ninja training, a powerful young newcomer interferes with his plans.

"A ninja must be strong, courageous, and silent! He creeps through the house on a secret mission. There may be obstacles! But have no fear--a true ninja can overcome all challenges"--

Flat Stanley mails himself to Japan to visit his hero, martial arts movie star Oda Nobu, and becomes his personal ninja.

Ruby sets out to learn her own secret skill at “Master Willow's School for Ninjas” in this charming picture book that celebrates confidence, creativity, and kindness. Includes a craft for making a felt stuffed dragon! Master Willow's Ninja School is a place where junior ninja saplings must learn many important skills: how to make themselves invisible, fight skillfully, meditate patiently and, most importantly, how to be brave and unleash their...