"The deal is made more significant because Amazon already owned part or all of Goodreads’ competitors, Shelfari and LibraryThing. It bought Shelfari in 2008. It also owns a portion of LibraryThing as a result of buying companies that already owned a stake in the site. Both are much smaller and have grown much more slowly than Goodreads.Amazon to Buy Goodreads - NYTimes.com
The deal did get some support from Hugh Howey, whose book “Wool” was originally self-published on Amazon and promoted through Goodreads and became a best seller. “The best place to discuss books is joining up with the best place to buy books — to-be-read piles everywhere must be groaning in anticipation,” he said in the companies’ news release."
Friday, March 29, 2013
Amazon to Buy Goodreads - NYTimes.com
Check this Wired article for more on the "Wool" phenomenon