An engaging look at ocean routes’ complicated beginnings and elusive impact. Sara Caputo’s Tracks on the Ocean is a sweeping history of how we have understood routes of travel over the ocean and how we came to represent that movement as a cartographical line. Focusing on the representation of sea journeys in the Western world from the early sixteenth century to the present, Caputo deftly argues that the depiction of these lines is inextricable from European imperialism, the rise of modernity, and attempts at mastery over nature. Caputo recounts the history of ocean tracks through an array of lively stories and characters, from the expeditions of Captain James Cook in the eighteenth century to tracks depicted in Moby Dick and popular culture of the nineteenth century to the use of navigational techniques by the British navy. She discusses how tracks evolved from tools of surveying into tools of surveillance and, eventually, into paths of environmental calamity. The impulse to record tracks on the ocean is, Caputo argues, reflective of an ongoing desire for order, schematization, and personal visibility, as well as occupation and permanent ownership—in this case over something that is unoccupiable and impossible to truly possess. Both beautifully written and deeply researched, Tracks on the Ocean shares how the lines drawn on maps tell the audacious and often tragic and violent stories of ocean voyages.