Every year, millions of geese embark on a three-thousand-mile migration from their winter quarters in the southern United States to their breeding grounds in the Canadian Arctic. Intrigued by what he’d read about the birds’ amazing annual journey, and desperate to emerge from a period of illness, William Fiennes decided to go with them. The story of his voyage turns out to be about a great deal more than geese. The arc of Fiennes’s extraordinary trip is the backbone of a narrative rich in meditations on philosophy and natural science, and deeply perceptive in its descriptions of both physical and emotional travel.