Facts on File

The Oregon Trail (Milestones in American History): Pathway to the West

By Tim McNeese

The Pony Express (Milestones in American History): Bringing Mail to the American West

By Tim McNeese

Marine Science (Pioneers in Science): The People Behind the Science

By Katherine Cullen, Scott McCutcheon, Bobbi McCutcheon

The Encyclopedia of Evolution

By Richard Milner