I saw `D3.js` and I was interested so I bought this [book](http://shop.oreilly.com/product/0636920025429.do)! I may be wrong, however I found it un-fulfilling.

Does anyone have prime material for mastering `D3.js`for data visualization?

I can see a lot of potential for `D3.js`and I am very keen and interested. 

thanks in advance!

**Update:**

I just completed reading [Interactive Data Visualization](http://web.archive.org/web/20160424170530/http://chimera.labs.oreilly.com/books/1230000000345/) for the Web by Scott Murray, great book! Try it, it's free.