The North seduces you. It can kill you too. Philip Schubert discovered the joys and dangers of travel in trackless wilderness starting in 1999 after reading Dillon Wallace's "The Lure of the Labrador Wild." He spent a decade retracing the routes in Labrador and northern Quebec described in "The Lure," in Wallace's follow-on book, "The Long Labrador Trail," and in Mina Hubbard's "A Woman's Way Through Unknown Labrador." Nothing in Dillon's early life as an impoverished youth on a farm suggested that he would still fascinate people nearly 150 years later. Dillon was blessed in fact with "Grit...