Scholastic Atlas of Exploration. Chelsea Hse., 1990-1994. Each volume covers one explorer or group of explorers. World's Great Explorers. Childrens Pr., 1990-1992.
Most volumes cover one specific explorer.
Explorers and Discoverers of the World. Gale Research, 1993. Bohlander, Richard E., ed. World Explorers and Discoverers. Who's Who in Pacific Navigation.