Tumblr, the blogging tool that has generated countless book deals, has introduced its first official analytics  tool through Union Metrics. Follow this link to get an invite to the service.

SocialTimes has more about the new tool: “Union Metrics will pull information from Tumblr through social data company Gnip. With 75 million blogs, 32 billion posts, and more than 70 million new posts on the blogging site per day, someone has to make sense of all that data … Union Metrics for Tumblr can help bloggers determine what kind of content resonates with their readers; marketers can use it to learn what people in their target demographic like to read.”

If you love the blogging site, check out our Tumblr Tips for Writers post and our Best Bookstores on Tumblr directory.