The first and second women to be named to the Supreme Court appear to be complete opposites, but they worked to make the U.S. a more equal place for all women.

They are the subject of the book, Sisters in Law: How Sandra Day O’Connor and Ruth Bader Ginsburg Went to the Supreme Court and Changed the World, by Linda Hirshman, that is the latest selection of Booked for Lunch, the Wilton Historical Society’s reading group.

The book will be discussed Thursday, Jan. 31, from 12:30 to 1:30, at the society’s museum complex at 224 Danbury Road.

The relationship between O’Connor and  Ginsburg — Republican and Democrat, Christian and Jew, western rancher’s daughter and Brooklyn girl — transcends party, religion, region, and culture. The biography includes revealing stories of how they fought for recognition in a male-dominated profession — battles that would ultimately benefit every American woman.

Hirshman also makes clear how these two justices have shaped the legal framework of modern feminism, setting precedent in cases dealing with employment discrimination, abortion, affirmative action, sexual harassment, and many other issues crucial to women’s lives.

Participants may bring a brown bag lunch, the society provides a beverage and dessert. There is no charge, but registration is recommended by email at info@wiltonhistorical.org or by calling 203-762-7257.