Prashant Agrawal is CEO of Indipepal.com, India's only social portal. He previously worked at Skadden Arps, McKinsey, and a hedge fund, and is a contributing editor to GQ India and the magazine’s business columnist.

Nandan Nilekani, co-founder of the IT company Infosys, wrote a primer on India that became the biggest nonfiction best-seller in the country's history. Now it hits the US, and it’s a must-read.