Segal, N.L., & Montoya, Y.S. Accidental Brothers: The Story of Twins Exchanged at Birth and the Power of Nature and Nurture. New York: St. Martin’s Press (in press, April, 2018).


N.L. Segal, G.E. Weisfeld, & C.C. Weisfeld (Eds.) (1997). Uniting Psychology and Biology: Integrative Perspectives on Human Development. Washington, D.C.: American Psychological Association Press.

  • Best-selling APA book

Segal, N.L. (1999/2000). Entwined Lives: Twins and What They Tell Us About Human Behavior. N.Y.: Dutton Press (hardcover) / Plume (softcover).

  • Doubleday Book Club: Special selection in the Library of Science, Natural Science, Astronomy, Nurse’s Book Society, Reader’s Subscription & Library of Speech Pathology
  • Featured alternate in the Behavioral Science Book Club

Segal, N.L. (2005/2007). Indivisible by Two: Lives of Extraordinary Twins. Cambridge, MA: Harvard University Press.

                  • (See Oskar y Jack, play by Mexican author Andrés Roemer (2011, Mexico City: Miguel Angel Porrúa;
                      premiere: September 8, 2012, Mexico City, Teatro Orientación, based in part on the essay “Oskar and Jack”
                      in this book).

Segal, N.L. (2011). Someone Else’s Twin: The True Story of Babies Switched at Birth Amherst, NY: Prometheus Books.

Segal, N.L. (2012). Born Together - Reared Apart: The Landmark Minnesota Twin Study. Cambridge, MA: Harvard University Press.

                Winner of the 2013 William James Book Award, American Psychological Association

Segal, N.L. (2017). Twin Mythconceptions: False Beliefs, Fables, and Facts About Twins.San Diego, CA: Elsevier. 
AirTalk®_Answering_everyth~1.mp3‎ (12 MB‎)