Although the questions dealt with in Freakonomics are unique and widely disconnected from each other, there's a common thread that connects them: Incentives. Be it the sumo, the school teacher, or the foot soldier of a crack gang, these people had strong incentives(surprisingly, not always financial) to do what they did. This book encourages you to look beyond the obvious and trust statistics more than popular beliefs. Great read to think differently.
This book will definitely change your view on economics