In his book The Facebook Effect, David Kirkpatrick outlines the story of how Thiel came to make his investment: Former Napster and Plaxo employee Sean Parker, who at the time had assumed the title of "President" of Facebook, was seeking investors for Facebook. Parker approached Reid Hoffman, the CEO of work-based social network LinkedIn. Hoffman liked Facebook but declined to be the lead investor because of the potential for conflict of interest with his duties as LinkedIn CEO.