Here is an early chapter book series about a magical, book-filled house that transports two children back in time.
Climb the ladder to adventure by reading Magic Tree House books! Don't forget your kusarigama! Did you ever take tea with a real live Ninja? Jack and Annie do when the Magic Tree House drags them backwards to ancient Japan where they find themselves in the cave of a Ninja master. Will they learn the secrets of the noble and mysterious Ninja? Or will they perish under the fiendish swords of the cynical and mercenary samurai warrior caste?