"The rare group of switched-at-birth identical twins is not just fascinating, but a unique window into human behavior and development. Accidental Brothers brilliantly captures the extraordinary story of two pairs of exchanged identical male twins in Colombia, South America, tracing their separation, growing up years, chance reunion and ultimate coming to terms with the profound impact of the switch on their lives." --Steven Pinker, Johnstone Professor of Psychology and author of Enlightenment Now: The Case for Reason, Science, Humanism, and Progress"A fascinating book from start to finish. It is simultaneously a tale of two sets of identical twins accidentally separated at birth and a tale of the science of the genetic and environmental forces that makes us who we are. It is sterling in its science and dramatic in the details of these four lives lived. It's the best book I've read this year." --David M. Buss, author of Evolutionary Psychology: The New Science of the Mind"This beautiful and moving story perfectly captures the balance between science and the humanities--what the scientific study of twins in all their variations reveals to us about nature and nurture, genes and upbringing, and biology and culture. It is told in a gripping narrative that takes the reader from a university laboratory in southern California to Bogota and La Paz in Colombia, South America, to track down and study what has to be the most compelling example ever recorded of twins switched at birth. At once tragic and uplifting, I was deeply moved and you will be, too." --Michael Shermer, publisher of Skeptic magazine and author of Heavens on Earth: The Scientific Search for the Afterlife, Immortality, and Utopia"Nancy Segal describes a birth mix-up that takes 'mistaken identity' to a whole new level, with two sets of twins involved in the switch. So many layers of complications! Her research offers a new way to think about thorny questions regarding genes, environment, and destiny." --Robin Marantz Henig, author of Pandora's Baby: How the First Test Tube Babies Sparked the Reproductive Revolution "This beautiful and moving story perfectly captures the balance between science and the humanities--what the scientific study of twins in all their variations reveals to us about nature and nurture, genes and upbringing, and biology and culture. It is told in a gripping narrative that takes the reader from a university laboratory in southern California to Bogota and La Paz in Colombia, South America, to track down and study what has to be the most compelling example ever recorded of twins switched at birth. At once tragic and uplifting, I was deeply moved and you will be, too." --Michael Shermer, publisher of Skeptic magazine, monthly columnist for Scientific American, Presidential Fellow at Chapman University, and author of Heavens on Earth: The Scientific Search for the Afterlife, Immortality, and Utopia"Nancy Segal describes a birth mix-up that takes 'mistaken identity' to a whole new level, with two sets of twins involved in the switch. So many layers of complications! Her research offers a new way to think about thorny questions regarding genes, environment, and destiny." --Robin Marantz Henig, author of Pandora's Baby: How the First Test Tube Babies Sparked the Reproductive Revolution "Nancy Segal describes a birth mix-up that takes 'mistaken identity' to a whole new level, with two sets of twins involved in the switch. So many layers of complications! Her research offers a new way to think about thorny questions regarding genes, environment, and destiny." --Robin Marantz Henig, author of Pandora's Baby: How the First Test Tube Babies Sparked the Reproductive Revolution

DR. NANCY L. SEGAL is Professor of Psychology at California State University, Fullerton (CSUF) and Director of the Twin Studies Center, which she founded in 1991. Dr. Segal has authored over 200 scientific articles and book chapters, as well as several books on twins, including Born Together-Reared Apart: The Landmark Minnesota Twin Study. Dr. Segal was recognized by the Orange County Register as one of the hundred most influential people in Orange County, California in 2014.Yesika S. Montoya is a psychologist in her native country of Colombia, with a degree from the Universidad Santo Tomas (2000). She earned a Master's degree in Social Work from Fordham University (2005), and has clinical work experience providing psychotherapy to children, adolescents, adults, and people affected by homelessness, mental illness, chemical addiction and HIV. Ms. Montoya also worked with the rescue, recovery and clean-up workers after the 9/11 attacks in New York City. She is currently employed in higher education as an Associate Director of Advising and an adjunct faculty member at the Columbia University School of Social Work.