"A unique window into human behavior and development." —Steven Pinker The riveting story of two sets of identical twins separated at birth and improbably reun

City girl in Montana looking for her Romeo... Sounds like the start of a Hallmark movie, right? Well, it would if they had movies about idiot women flying acros

A leading expert on twins delves into the stories behind her research to reveal the profound joys and real-life traumas of 12 remarkable sets of twins, triplets

Columbia, 1988. Due to an oversight in a hospital nursery, one twin in each pair of idential twin brothers was switched with a twin in the other pair. Jorge and

NEW YORK TIMES BESTSELLER • From the beloved Pulitzer Prize–winning author—an irresistible novel exploring the slippery alchemy of attracting opposites, a