"If, as the poetess Emily Dickinson wrote, 'the brain is deeper than the sea,' then Mariano Sigman's book is the perfect travel guide to those uncharted abysses. Concise, pithy, sprinkled with illuminating metaphors, this book takes you on a most entertaining journey into the subtleties and oddities of the human mind. This trip into ourselves is rewarded with many insights into such ill-known concepts as inner unconscious battles, lucid dreams, bilingual brains and mind-reading infants. The company of brilliant minds, including Chomsky, Turing, Rousseau, Molière, Plato, Sagan, and Freud, and their revisiting in the smart light of Mariano Sigman's clever experiments, make this book enormously enjoyable, from beginning to end -- a riveting scientific page-turner."
—Stanislas Dehaene, author of Consciousness and the Brain and Reading in the Brain