During a sabbatical leave in 1968, Sam Wright and his new wife, Billie, moved into the wilderness of Alaska. They wanted to experience intimately the traditional, Native American way of life by emulating it as much as possible. Billie Wright's award-winning book, Four Seasons North: A Journal of Life in the Alaskan Wilderness, was her account of their first year in the cabin which they named Koviashuvik, an Eskimo word for "living in the present moment with quiet joy and happiness." Billie died in December 1987. In 1988, Sam published Koviashuvik as the second volume in their library of nature philosophy. Edge of Tomorrow is the third in the Wrights' series.