Just thought I’d post over here that Humble Bundle currently have a sale a selection of books from the O’Reilly Definitive Guide series. At the $1 tier is the Javascript book and I know folks have mentioned wanting to pick up more Javascript. I’ve not personally read this book but in general I’ve found O’Reilly’s books to be well written and I have a good selection of their books. At a dollar, that also helps charity too, I think it is at least worth a look to see.
I got this a day or so ago — great bargain — lots to read. If starting from scratch might take a while.
Also, if you have Kindle Unlimited — there are some ebooks available on there as well if someone wants to learn without investing a lot into cost of materials.