Yoto says: The time-travellers journey to Japan to seek justice! The fifth story in The Magic Treehouse Series.
Have you ever met a real live ninja? Jack and Annie do when the Magic Tree House whisks them back to ancient Japan in search of enchantress Morgan le Fay. When they arrive, they find themselves in the cave of a ninja master. Will they learn the secrets of the ninja? Or will the evil samurai warriors get them first?