The Unlikely Pilgrimage of Harold Fry by Rachel Joyce.
Harold Fry–retired sales rep, beleaguered husband, passive observer of his own life—sets out one morning to mail a letter and just keeps going. Setting off on the long journey, he wears the wrong jacket, doesn’t have a toothbrush, and leaves his phone at home–in short, he is wholly unprepared. But as he travels, Harold finally has time to reflect on his failings as a husband, father, and friend, and this helps him become someone we (and, more important, his wife Maureen) can respect.
Copies of the book are available at the library.