I found a good website that gives free trial to people for 30 days on the entire book.
http://www.chicagomanualofstyle.org/home.html It really is great. The grammar part kind of put me off, seeing that the entire section 5 consists of my grammar lessons since I was in grade school, all the way up to high school.
But there are still a ton of other rules there in other chapters. It's quite staggering for me to read it actually. Why didn't I get into all these earlier?