The New York Post reported that former Goldman Sachs (NYSE:GS) executive Greg Smith has signed a book deal for $1.5 million to tell his story. He reportedly signed the deal with Hachette Book Group on Thursday.Smith quit Goldman earlier this month and wrote a piece in the New York Times bashing the company.Goldman Sachs Group (NYSE:GS) has potential upside of 7% based on a current price of $125.36 and an average consensus analyst price target of $134.13.