The Know-It-All - One Man's Humble Quest to Become the Smartest Person in the World

Bestselling author and human guinea pig A. J. Jacobs puts his life to the test and reports on the surprising and entertaining results. He goes undercover as a woman, lives by George Washington’s moral code, and impersonates a movie star. He practices "radical honesty," brushes his teeth with the world’s most rational toothpaste, and outsources every part of his life to India—including reading bedtime stories to his kids.

And in a new adventure, Jacobs undergoes scientific testing to determine how he can put his wife through these and other life-altering experiments—one of which involves public nudity.

Hospitalized with a freak case of tropical pneumonia, goaded by his wife telling him, “I don’t want to be a widow at forty-five,” and ashamed of a middle-aged body best described as “a python that swallowed a goat,” A.J. Jacobs felt compelled to change his ways and get healthy. And he didn’t want only to lose weight, or finish a triathlon, or lower his cholesterol. His ambitions were far greater: maximal health from head to toe.

The task was epic. He consulted an army of experts— sleep consultants and sex clinicians, nutritionists and dermatologists. He subjected himself to dozens of different workouts—from Strollercize classes to Finger Fitness sessions, from bouldering with cavemen to a treadmill desk. And he took in a cartload of diets: raw foods, veganism, high protein, calorie restriction, extreme chewing, and dozens more. He bought gadgets and helmets, earphones and juicers. He poked and he pinched. He counted and he measured.

Raised in a secular family but increasingly interested in the relevance of faith in our modern world, A.J. Jacobs decides to dive in headfirst and attempt to obey the Bible as literally as possible for one full year. He vows to follow the Ten Commandments. To be fruitful and multiply. To love his neighbor. But also to obey the hundreds of less publicized rules: to avoid wearing clothes made of mixed fibers; to play a ten-string harp; to stone adulterers.

The resulting spiritual journey is at once funny and profound, reverent and irreverent, personal and universal and will make you see history's most influential book with new eyes.

Jacobs's quest transforms his life even more radically than the year spent reading the entire Encyclopedia Britannica for The Know-It-All. His beard grows so unruly that he is regularly mistaken for a member of ZZ Top. He immerses himself in prayer, tends sheep in the Israeli desert, battles idolatry, and tells the absolute truth in all situations - much to his wife's chagrin.

Throughout the book, Jacobs also embeds himself in a cross-section of communities that take the Bible literally. He tours a Kentucky-based creationist museum and sings hymns with Pennsylvania Amish. He dances with Hasidic Jews in Brooklyn and does Scripture study with Jehovah's Witnesses. He discovers ancient biblical wisdom of startling relevance. And he wrestles with seemingly archaic rules that baffle the twenty-first-century brain.