The largest museum library system in the world, Smithsonian Libraries and Archives holds more than 2 million items. Guided by Smithsonian librarians Jane Quigley and Leslie Overstreet, visit three research collections normally accessible to members of the public by appointment only: the National Museum of Natural History Library, the Joseph F. Cullman 3rd Library of Natural History, and the John Wesley Powell Library of Anthropology. In addition to brief presentations about the collections, selected books—from 16th-century illustrated herbals and accounts of Captain Cook’s voyages to 21st-century works naming new species of plants and animals by Smithsonian scientists—are on display for browsing, questions, and discussion.