’s secret retail empire

Jeff Bezos has a loud laugh. But’s founder and CEO is keeping quiet about his expansion efforts, which now include sites as varied as, Zappos, and as of Monday,

Will buy prove taxing for is poised to buy household-goods retailer Quidsi, the parent of, on Monday for $540 million in cash and debt. (Update: On Monday, Quidsi confirmed the deal with VentureBeat.)