Goodreads now has 10 million members, who have "shelved more than 360 million books," with six additional ones being added every second. While it took five years for Goodreads to reach the five million member mark, total membership has doubled in the past 15 months.
"We've come a long way since Elizabeth [Elizabeth Khuri Chandler] and I built Goodreads from our living room, motivated by the belief that there was a better way to discover and discuss good books--and that we could build it," wrote co-founder Otis Chandler on the Goodreads blog.