Shameless Plug: WoW Programming: the book: episode ii: the sequel
The new second edition of World of Warcraft Programming: A Guide and Reference for Creating WoW Addons is now available. I rewrote and updated nearly the entire Reference section for this edition (which is also online and continually updated at wowprogramming.com)… but since the publisher has some silly aversion to working with goblins, I had to let my human lackey take official credit.
Anyway, if you’re looking to become a successful builder of widgets & gizmos like me (or that elf who wrote the rest of the book), good luck this is the book for you!