Overall sales for the first quarter at Amazon.com increased by 18 percent to $4.89 billion, as operating income increased 23 percent to $244 million in the first quarter, and net income rose 24 percent to $177 million. But the growth was driven heavily by electronics, as the media segment–which includes books and digital downloads among other items–continues to lag the company’s overall performance. North American media sales of $1.305 billion were up 8 percent compared to a year (similar to the rise in the previous quarter), while international media sales of $1.418 billion were up just six percent, held back […]