Grade 4-6-These absorbing profiles of explorers from uniquely different periods of history are ideal for novice report writers. Their concise and accessible texts, attractive page layouts, and excellent illustrations make them appealing. Vikings draws on maps, folktales, and artifacts to trace the movement of Scandinavian warriors through North Atlantic islands to the inhospitable American continent. Cousteau reveals that the former French naval officer, best known for his exquisite films of marine life, spent his early years actually designing and refining much of the equipment necessary to take divers and cameras to remote undersea regions. Sacagawea re-creates the woman's adventurous journey with Lewis and Clark and discusses her longevity as an American legend, including her appearance on the new gold dollar coin.