SO YOU NEED HELP?
There is only so much that can be covered in a single book and inevitably as you start to create your own apps you will come across difficulties that are not discussed here. Fortunately, there are a couple of highly active communities around the web where people will be happy to help you out.
The Official three.js Forum
The best place to find help with three.js is the official forum. It’s only been around since April 2017, but it’s highly active and you’ll find lots of enthusiastic people there who will be happy to help you out.
You might even find me! I’m an admin and my username is @looeee. Say hi!
three.js on StackOverflow
Traditionally, StackOverflow has been the place to ask three.js related questions, and it is still a good place to check first before you make a post on the forum.
The three.js Subreddit
It’s not particularly active, but you can also try your luck with the three.js subreddit. It’s a better place to find interesting projects than answers to your questions - just beware of falling into the black hole of Reddit and having your life sucked away into a dreary existence of memes and trolling!