Strange Sally Diamond by Liz Nugent

In her early forties, Sally has led a sheltered life, not really interacting with anyone except her father. When he passes away, she's forced to learn how to get along in the world--but there are secrets that Sally's father has kept from her, and confronting her past and the trauma that goes along with it is difficult. Luckily, Sally has an aunt and a family friend to help her along the journey. However, it seems that the people from Sally's childhood cannot be put behind her for good. Strange Sally Diamond is a great read-alike for Lisa Jewell and Ruth Rendell's standalone novels.