1. Entwined lives: Twins and what they tell us about human behavior;Segal,1999
2. Born together – Reared apart: The landmark Minnesota twin study;Segal,2012
3. Twin mythconceptions: False beliefs, fables, and facts about twins;Segal,2017
4. Deliberately divided: Inside the controversial study of twins and triplets adopted apart;Segal,2021
5. Unrelated look-alikes: Replicated study of personality similarity and qualitative findings on social relatedness;Segal;Personality and Individual Differences,2013