"Know thyself" the ad for eight books from Princeton University Press says. Here are the titles and subtitles of the books in their ad from The New York Review.
Soul Dust: The Magic of Consciousness
Why Everyone (Else) Is a Hypocrite: Evolution and The Modular Mind
The Recursive Mind: The Origins of Human Language, Thought, and Civilization
Identity Economics: How Our Identities Shape Our work, Wages, and Well-Being
Blind Spots: Why We Fail to Do What's Right and What to Do About It
Beyond the Brain: How Body and Environment Shape Animal and Human Minds
Braintrust: What Neuroscience Tells Us About Morality
The Brain and the Meaning of Life
The last, by Paul Thagard, had no subtitle but the ad offers this comment on its content from Michael Shermer in Science.
"[Thagard]offers a tightly reasoned, often humorous, and original contribution to the emerging practice of applying science to areas heretofore the province of philosophers, theologians, ethicists, and politicians. What is reality and how can we know it? Are mind and brain one or two? What is the source of the sense of self? What is love? What is the difference between right and wrong, and how can we know it? What is the most legitimate form of government? What is the meaning of life, and how can we find happiness in it? Thagard employs the latest tools and findings of science in his attempts to answer these and additional questions,"
Before you invest I suggest you try to answer a few of these questions for yourself, as the heading of the ad seems to suggest.