From the NY Times:
On Thursday, Goodreads will announce that it has acquired another start-up, Discovereads.com. It uses machine learning algorithms to analyze which books people might like, based on books they’ve liked in the past and books that people with similar tastes have liked.
Otis Chandler, Goodreads’s founder and chief executive, says the site has been an online version of walking into a friend’s living room and scanning the bookshelves to get recommendations. But readers need more than that, he said, particularly now that libraries, bookstores and some newspapers’ book review sections are disappearing and e-bookstores are inspiring more self-published authors.
“This will give the casual reader a quick answer to ‘What should I read first?’” he said. Once people have rated 10 books on a scale of five stars, Goodreads will be able to suggest books they might like.