Jill Fredston has traveled more than twenty thousand miles of the Arctic and sub-Arctic-backwards. With her ocean-going rowing shell and her husband, Doug Fesler, in a small boat of his own, she has disappeared every summer for years, exploring the rugged shorelines of Alaska, Canada, Greenland, Spitsbergen, and Norway. Carrying what they need to be self-sufficient, the two of them have battled mountainous seas and hurricane-force winds, dragged their boats across jumbles of ice, fended off grizzlies and polar bears, been serenaded by humpback whales and scrutinized by puffins, and reveled...