Columbia subject headings:
Harvard subject headings:
Couples--Fiction.
Detective and mystery fiction.
Domestic fiction.
Fiction.
Marriage--Fiction.
Psychological fiction.
Secrecy--Fiction
Spouses--Fiction
Thrillers (Fiction)
Princeton subject headings:
Abused women--Fiction.
Abusive men--Fiction.
Family secrets--Fiction.
Fiction.
Marital conflict--Fiction.
Married people--Fiction.
Spousal abuse--Fiction.