While we've looked at a great deal of d3, we've only just scratched the surface of what d3.js can do. It is a large and powerful library. There are many books written on the subject of d3, so we can't cover it all. A great resource for d3 is Swizec Teller's book Data Visualization with d3.js, Packt Publishing. There are tons of additional functions that we'll uncover, as we develop some of the visualizations in the rest of the book. We'll also visit some further applications of the functions presented in this chapter.