Remember the Smashing Book Mystery riddle from a couple of months ago? Guess what: the Mystery continues! To celebrate the launch of the SmashingConf NYC and our lovely book, we’ve prepared a new riddle, and this time it’s not going to be any easier, but the reward is definitely worth the effort.
How does it work? Below you’ll find an animated GIF that contains a hidden message. Once you’ve resolved the mystery, you’ll see a Twitter hashtag displayed in plain text.
Are you ready? Action! (Hint: watch out for the file name).

A hint: watch out for the file name.
Among the first readers who tweet us with the hidden hashtag, we’ll raffle a quite extraordinary, smashing prize (and a couple of other Smashing extras):
Please notice that to avoid spoilers, comments are closed for this post. And sorry, we aren’t going to make it too easy for you.
Alright. Let’s get to work. Or have you already figured it out? 😉
Source Article from http://www.smashingmagazine.com/2014/01/28/the-new-smashing-mystery-riddle-smashingconf-ny/