Ocean : A History of the Atlantic Before Columbus by John Haywood

Ocean is an ambitious history of the pre-Columbian Atlantic Ocean, a story that begins with the formation of the mid-Atlantic ridge some 200 million years ago and ends with the Castilian conquest of the Canary Islands in the fifteenth century, which provided a template for the methods used by the Spanish in their colonisation of the New World.

John Haywood argues that the perception that Atlantic history begins with the first voyage of the celebrated Genoese navigator is a mistaken one, and that the seafaring and shipbuilding skills that enabled European global exploration and expansion did not arrive fully formed in the fifteenth century, but were learned over centuries and millennia in the Atlantic and its marginal seas. The pre-Columbian history of the Atlantic is the story of how Europeans learned to master the oceans.