the Adventures of Sasha and Malia at White House

Living in the White House is a great adventure for young Sasha and Malia . . . especially when they discover a mysterious, moving bookcase that leads them into a passageway through time! Before they know it, the two curious sisters find themselves back in the time of slavery and faced with a very important challenge. Will they find the courage to help free the slaves and change the course of history forever?