Psychological realism emphasizes characters' inner thoughts and motivation. This paper discusses the inner self in the Silent Patient, by Michaelides. The Woman in the Window, by AJ Finns, and the Girl on the Train by Paula Hawkins. This research will also examine the characters' inner selves and moral and ethical dilemmas. Identifying the features of psychological realism, such as characters' thoughts and motivations, minds and personalities, psyche and its relationship to a novel, and flashbacks of various types. These are psychological thrillers.These works compare the depression and abandonment. Inner conflicts, family issues, heartbreak, and tragedy as a common cause.Characters become murderers, cheaters, and depressed.