Malcolm Gladwell's Classic Book Contains Timeless Lessons for Success

A new app called Push it is sitting at the top of the App Store promising little more than the ability to send “push notifications to your friends.” The app features only two screenshots — one of a big red button and another basic, black-and-red screen with text that says “sending.” So what is going on here? And how is this app No. 1 in five countries when many people who install it can’t even use