There was not much in this book that I didn’t know, but what I didn’t know this book explained it quite well. There were things I had heard of like
WeakSets that didn’t quite make sense to me but Flavio gave me the gist of each with code snippets and clearly defined explanations.
You can read this book in a day or two, it’s that short. You have to sign up for his newsletter to get access to these quick reads but it is worth it if you want information like this in book form.
I guess that’s the rub: these are basically blog posts collected into a book in order to get you signed up for his newsletters so that he can convert you into a paying customer for his courses. I get the rationale and I totally did it. But I feel like Flavio could put something more for asking me to add another newsletter to my inbox.
The good news is services like Kill the Newsletter to save your inbox, however it doesn’t seem to work for double opt-ins as there is no inbox for you to do a second opt-in in Kill the Newsletter.
If you aren’t offended by free books that are basically a collection of blog posts to get you to sign up for a newsletter to sell you a course, then I suggest you check out Flavio’s books. I happen to like his content so that’s why the high rating.