Start with high-confidence marriage & family books, then narrow by subgenre or adjacent topics.
Marriage and the Family in the Middle Ages
Frances Gies
Marriage and Family: the Quest for Intimacy
Robert Lauer, Jeanette Lauer
The Origin of the Family, Private Property and the State
Friedrich Engels, Michèle Barrett
Intimate Relationships, Marriages, and Families
Nancy Stinnett, Nick Stinnett
Marriage Markets
June Carbone, Naomi Cahn
The Elementary Structures of Kinship
Claude Levi-Strauss
Buying a Bride
Marcia A. Zug
The Marriage and Family Experience
Bryan Strong, Theodore Cohen
Hannah's Children
Catherine Pakaluk
Expat Partner
Carine Bormans, Marie Geukens