In Open, Block paints a down to earth picture of how an open marriage can work, and specifically why it works for her and her husband. In dissecting other people’s strong reactions to her choice, she explores the question of why cheating is more socially acceptable than open marriage. In part, she concludes, the lack of models for successful functional open marriages is such that the general public is not yet equipped to handle treating it as anything other than abnormal.

Open challenges our notions of what traditional marriage looks like, and presents one woman’s journey down an uncertain path that ultimately proves that open marriage is a viable option, and one that’s in fact better for some couples than conventional marriage.