Ever since news of President Obama's reading picks for his summer vacation went public, sales of the books have skyrocketed on Amazon.com, reports Politico.
Wall Street Journal: "To be sure, it doesn't take many sales to move the needle on Amazon. But the presidential effect is clear: when Amazon asks on the site, 'What do customers ultimately buy after viewing this item?', guess what books come up pretty much every time? The other four."
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