Broca's Brain is the most recent production of Sagan's brain, and after justifying the title (a reference to a French neuroanatomist's celebrated cerebrum), the remainder of the book tells more of Sagan's involvement in the scientific enterprise than it does of the late Paul Broca's…. [The coverage] on out-of-body type thanatological experiences seems far-fetched both factually and theoretically. On points of theology, his arguments from "higher criticism" are dated, and his archeology suffers from a similarly outdated singlemindedness. Nonetheless, the volume's strengths far surpass any weaknesses, making reading it a sheer vacation.

James H. Booth, in a review of "Broca's Brain: Reflections on the Romance of Science," in Science Books & Films, Vol. XV, No. 4, March, 1980, p. 190.