I have read this ebook recently. As it is in electronic format, I didn’t take many notes but it looks quite complete touching many subjects. The site is quite good and you can get a list of all recommended books.
The general idea is you dont have to spend a fortune in knowledge that you can get just reading several key books (buying or borrowing from a library).
I agree (high/good) education is becoming a luxury and knowing that there are alternatives is a safe-line.
I would read it again but in paper so you can have a physical reference in your desk.