New York Review of Books

“For those of us who desire to understand why lives turn out the way they do, Segal’s book inclines us to stop and reconsider, in fresh ways...”
— from review by Frank J. Sulloway
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Personality and Individual Differences

“Following the well-deserved success of her critically-acclaimed Entwined Lives: Twins and What They Tell Us about Human Behavior (Plume, 2000), Nancy Segal has written another gem of a book about twins... Indivisible by Two combines literary non-fiction with science and is one of only a few books that I literally couldn’t put down until I had read it in one sitting.”
— from review by P.A. Vernon
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