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Goodreads,the site that lets you share the books you’ve read, are reading, and want to read, says it has just hit the 10 million member mark.
That means the company has doubled its registered user base in a little more than a year — 15 months, to be more precise. It took Goodreads four and a half years to reach 5 million members back in May 2011.
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I find the site very useful to track the books I've read and to get suggestions on what to read.