剧情简介：JACK AND ANNIE are on a mission to save Merlin from his sorrows! Charged with finding the second of four secrets of happiness, the brother-and-sister team travel back in the magic tree house to the period known as the Renaissance. This time, Jack and Annie will need more than a research book and a magic wand. They'll need help from one of the greatest minds of all time. What wi...(展开全部)
作者：Mary Pope Osborne
出版社：Random House Childrens Books
ISBN：9780375937293
