The Last Letter - Rebecca YarrosOne letter. That was all it took for Beckett Gentry to fall for Ella MacKenzie, his buddy Ryans sister. Through her letters, Ella spoke to his heart, fueled his dreams, and made his days in Afghanistan bearable. Until Ryans life ends and so do the letters. Leaving the military, Beckett heads to Colorado with one destination in mind Ella. Despite the guilt Beckett feels over his friends death, hes determined to carry out his promise to watch over Ryans