Amazon has announced that it will purchase Goodreads. The book recommendations site has roughly 16 million users and was founded in 2007.

“Goodreads has helped change how we discover and discuss books and, with Kindle, Amazon has helped expand reading around the world,” said Russ Grandinetti, vice president of Kindle content for Amazon. “In addition, both Amazon and Goodreads have helped thousands of authors reach a wider audience and make a better living at their craft. Together we intend to build many new ways to delight readers and authors alike.”

Terms of the deal were not disclosed.