Ranked in these QuestionsQuestion Ranking
Pro Comprehensive resource
D3.js in Action is 352 pages long and provides a strong foundation in D3.js before providing you with a comprehensive list of ways it can be used.
Pro Some material available for free
Con Intimidating for beginners
Due to the heavy volume of information packed into the book, it can be a discouraging place to start for someone new to D3.js.