Buried too deep / Karen Rose.

Cora-Jane Winslow's father walked out on her family 23 years ago; his letters to her over the years the only connection she has had to him. When his body is discovered in an abandoned building, she is shocked to discover he has been dead all this time. What happened to him and who would cover up his murder by writing the letters? After his post-traumatic stress disorder forced him to run away from his life, Phin Bishop returns to the Burke Broussard Private Detective Agency, only to stumble upon an armed break-in. Cora-Jane is seen running from the building and his colleague Joy has been shot. When it appears the shooting is related to Cora-Jane's father, the Agency step in to offer protection while they hunt for the perpetrator. Someone knows what really happened to Cora Jane's father and will stop at nothing to prevent their long-buried secrets being discovered.