Chinese dissident artist Ai Weiwei continues to challenge the Chinese government and get past the censors, despite the fact that they have taken away his passport and blocked any mention of his name from the internet. Now a book is being published, based mostly on Ai Weiwei's tweets. Here's a video about the book, plus his latest exhibition in the US.

And when you're finished watching that, have a look at another recent Ai Weiwei installation, 760 Bikes.

(Ai Weiwei's 750 Bikes. Image from fastcodesign.com.