Never far away : a novel / Michael Koryta.

Once a wife, mother, and witness to a gruesome crime, Leah Trenton was extended a miraculous olive branch in the form of the state's protected witness program. But for this second chance at life, Leah would have to leave behind her Midwestern roots to the northernmost tip of Maine. Alone and isolated along the banks of the Allagash River, she is determined to focus on the present, on her reclaimed future, but the demons of her past, are relentlessly chipping away at Leah's protected hideaway. Meanwhile, in the wake of their father's untimely death, Leah's children are sent to stay with her, though they are desperate to return back home. They embark on a cross country homeward journey but before they reach, danger finds them and it is Leah who must come out of her seclusion to search for and protect her children.