As Ryan Boone struggles to come to grips with not being able to keep a promise he made to his dying wife, Larkin’s Letters propels readers into the mind of Ryan as he struggles with frequent visits from her ghost and a series of letters she leaves behind. Ryan Boone worked hard to become one of Hollywood’s most sought-after actors, but no matter how busy or famous he became, he always remained loyal to his childhood best friend, Larkin James. When Larkin is diagnosed with leukemia, Ryan sacrifices his career to be by her side and in turn realizes how much he had always loved her. Throughout Larkin’s sickness, Ryan promised her that he wouldn’t let her die alone. But we learn that not all of our promises are within our control.