I have to recommend this great piece by Kara Swisher in Vanity Fair. Unlike the tech magazines and blogs, VF is able to really dig deep into the story behind the world’s first Billion Dollar App.

The sale of Instagram to Facebook for a cool billion in the spring of 2012 was the ultimate Silicon Valley fairy tale: 18 months from launch to offer. But, for co-founder and C.E.O. Kevin Systrom, it was more of a roller-coaster ride, with several missed opportunities, at least two “aha” moments, and one major reboot.

Read The Money Shot