UPDATE: Tumblr is working again. The popular microblogging site Tumblr was down for 20 hours with this message: “We’ll be back shortly. We’re working quickly to recover from an issue in one of our database clusters.  We’re incredibly sorry for the inconvenience.”

Already the company has fended off rumors that all the files were lost. Business Insider has more: “Earlier, we wondered if Tumblr‘s extremely long downtime meant it might have lost everything.’That’s ridiculous,’ is Tumblr’s official response from President John Maloney.”

The site has been a seemingly endless font of book material and book deals–are you concerned about the outage? For your late afternoon reading pleasure, here are  a number of Tumblr-to-book deals we covered on GalleyCat:
Pets Who Want to Kill Themselves Tumblr Book Deal
Stuff Hipsters Hate Tumblr Book Deal
Hipster Puppies Tumblr Book Deal
What I Wore Tumblr Book Deal
GQ Urges Publishers to Stop Tumblr-to-Book Deals