There should be books at the library about him. There is also a wonderful documentary called "Rivers and Tides" that could be on Netflix.
There should be numerous videos about him and his work on youtube.
There is also tons of things on the internet in general. He might be the most popular sculptor alive right now. He's done a wonderful job of marketing himself. And the funny thing is that no one can purchase the majority of his work because the work is ephemeral, meaning they are so fragile that they fall apart very quickly.