What is the author's style in Four Voyages to the New World; Letters and Selected Documents by Christopher Columbus?

Four Voyages to the New World is structured by trip; that is, chronologically. For voyages for which Cohen included several excerpts of Hernando Colon's biography of his father, these excerpts are usually dispersed among other sources to provide a more balanced perspective. The accounts of each voyage include a map of the route Columbus and his men took after each section, as well as one map displaying all four voyages.