内容简介：
Primary Sources Make These Twelve Books Unique The titles in this visually stunning new biography series will provide middle school readers with an understanding of each explorer's life and achievements. Primary source documents such as journal entries, maps, and letters supplement engaging and detailed prose to explain the voyages and the impact they had on society and history. Richly illustrated with full-color maps, paintings, and other relevant images, this series offers a full-bodied portrait of noteworthy explorers and the period in which they lived.