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ADVENTURE IS WAITING INSIDE EVERY BOOK! MAGIC TREE HOUSE.
#5 Night of the Ninjas by Mary Pope Osborne.
The magic tree house whisks Jack and Annie back to ancient Japan, where they meet real ninjas! In the ninja master's cave, they have the chance to learn the secrets of the ninja.
But will evil samurai warriors track them down?
The magic Treehouse whisks Jack and Annie back to ancient Japan. ..