Nuts and Bolts Roma Agrawal W.W. Norton & Co., $29.99 What do you get when you pose a challenge, weave in a cast of characters driven by hunger, frustration, curiosity, compassion or maybe even a ...

Nuts and Bolts: Seven Small Inventions That Changed the World in a Big Way By Roma Agrawal W. W. Norton & Company 272 pages We may earn a commission when you buy products through the links on our ...