Whether related by biology, marriage, circumstance, or choice, aunts embody a uniquely flexible familial role. The aunt-niece/nephew relationship though often overlooked is critical and complex, one that appears at the core of a resilient, healthy family life.

In this engaging book, Laura Ellingson and Patricia Sotirin construct a consideration of "aunts" that moves from noun to verb. "Aunts" is more than a group of people or a role; instead, "to aunt" is a practice, something people "do." Some women "aunt" as second mothers, friends, or mentors, while others play more peripheral...