Our senses are what make life worth living. They allow us to appreciate a sip of an ice-cold drink, the sound of laughter, the touch of a lover. But only recently have incredible advances in sensory biology given us the ability to understand how and why our senses evolved as they have. In this book, biologist Ashley Ward takes listeners on a breathtaking tour of how our senses function. Ward looks at not only the five major senses—vision, hearing, taste, smell, and touch—but also a host of other senses, such as balance and interoception, the sense of the body’s internal state.

Gazing at the stars, falling in love, or listening to music, we sometimes feel a transcendent connection with a cosmic unity and things larger than ourselves. But these experiences are not easily understood by science, which holds that all things can be explained in terms of atoms and molecules. Is there space in our scientific worldview for these spiritual experiences?

Timepieces have long accompanied us on our travels, from the depths of the oceans to the summit of Everest, the ice of the arctic to the sands of the deserts, outer space to the surface of the moon. The watch has sculpted the social and economic development of modern society; it is an object that, when disassembled, can give us new insights both into the motivations of inventors and craftsmen of the past, and, into the lives of the people who treasured them.

Robert Sapolsky’s Behave, his now classic account of why humans do good and why they do bad, pointed toward an unsettling conclusion: We may not grasp the precise marriage of nature and nurture that creates the physics and chemistry at the base of human behavior, but that doesn’t mean it doesn’t exist. Now, in Determined, Sapolsky takes his argument all the way, mounting a brilliant (and in his inimitable way, delightful) full-frontal assault on the pleasant fantasy that there is some separate self telling our biology what to do.

What makes for a happy life, a fulfilling life? A good life? In their “captivating” (The Wall Street Journal) book, the directors of the Harvard Study of Adult Development, the longest scientific study of happiness ever conducted, show that the answer to these questions may be closer than you realize.