A.J. Jacobs

It's All Relative

The World's Cities

The Year of Living Constitutionally: One Man's Humble Quest to Follow the Constitution's Original Meaning (Unabridged)

The Know-It-All : One Man's Humble Quest to Become the Smartest Person in the World (Unabridged Edition)

The Puzzler: One Man's Quest to Solve the Most Baffling Puzzles Ever, from Crosswords to Jigsaws to the Meaning of Life (Unabridged)