The following video is part of our "Motley Fool Exclusive Interview" series.

In today's edition, analyst Austin Smith interviews acclaimed author and New York Times columnist Charles Duhigg about his recent book The Power of Habit and the iEconomy series he's written for the Times.

Unbeknownst to most consumers, many retailers are tracking your spending habits so closely that some can tell whether a shopper is pregnant, has moved to a new home, or is in the midst of a divorce, all simply based on their spending patterns. Duhigg reveals which retailers do it best, and who knows more about us than we might think.

Austin Smith has no positions in the stocks mentioned above. The Motley Fool owns shares of Darden Restaurants. Motley Fool newsletter services recommend Wal-Mart Stores. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.