I enjoyed reading about China and Portugal in the 1400's. Vasco De Gama played a part in this saga. Ancient Map collecting was a new subject for me. Especially interesting was the idea of the 'New World' was discovered in that time period by the Chinese seemingly before Columbus in 1492. However, the format was disconcerting to me. I am not fond of changing time periods every chapter or so. I lose track of the characters and their story. Recommend.