In a series of compelling case studies, Thell shows authors of travel narratives repeatedly encountering the central problem of any empirical project: how to relay a personal, particular experience in a way that renders it public and universal, how to invent knowledge that can exist outside the viewpoint of the knower. The standard theoretical resource for work of this stamp is Bruno Latour’s Actor-Network Theory. . . [But] Thell’s resource is more surprising; she locates the invention of the scientific observer in the authorial voice of travel narratives. . . . Travel narratives therefore relied on a double act of imagination. They afforded their readers the delight of imagining strange new worlds — the typical imagination-work we associate with literature. . . . But travel narratives also manufactured a new kind of witness, the rational observer necessary to science, humanism, and progress. Taken as a genre, travel narrative literally imagines that person into being. This is the second, and more magnificent, variety of imagination work: the one that involves a profound personal transformation. From this mixed mélange of hack authors and opportunists, aristocrats and idle travelers, editors and fabulists, a new species of person was born.