These tutorials address an older version of D3 (3.x). See my book Interactive Data Visualization for the Web, 2nd Ed. to learn all about the current version of D3 (4.x).
Download the sample code files and sign up to receive updates by email. Follow me on Twitter for other updates.
These tutorials have been generously translated to Catalan (Català) by Joan Prim, Chinese (简体中文) by Wentao Wang, French (Français) by Sylvain Kieffer, Japanese (日本語版) by Hideharu Sakai, Russian (русский) by Sergey Ivanov, and Spanish (Español) by Gabriel Coch.