U.S. trade e-book sales in a three-month period ending in June more than tripled compared to a year ago because they're more accessible on your cell phone and other gizmos, The Associated Press writes.
In other words, you don't have to shell out $299 for Amazon's Kindle if you already have, say, an iPhone, to read your favorite book digitally.
Shanna Vaughn, 35, an e-book fan, summed it up this way for the AP:
"I never really wanted something that was a single-function device. I just couldn't see spending ... $300 for a device where I'm sort of locked in to one retailer. Whereas my phone, that does everything."
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