Mark Cuban's How To Win At the Sport Of Business is an entertaining, quick read. I think it may just be blog posts he's written before but I reread it occasionally. It's not advice for how to be an investor necessarily, just general "how to be good at business" advice. You will see advice that he uses in some of his judgements for investing. (Example: If a new company has a bunch of swag, you know they're burning for no reason)
The Finance and Capital Markets section of Khan Academy is great content. Learn how to read the 3 financial statements and you will know the language of business.
Lori has a book too, but it's more useful if you actually have an invention and what it takes to get it patented and turned into a business. There's valuable lessons in it though.
I read 2 of Daymond's books and they're just general life stories about his rise. I read Kevin's and it was filled with basic advice like "get a credit card and build credit."
How To Win, Mark Cuban
Quick read and only a buck on Amazon
The picture linked in my view has the cover of his book.
Edit:https://www.amazon.com/How-Win-Sport-Business-Can-ebook/dp/B006AX6ONI
You can buy his ebook which is just an aggregation of his blog posts. Super cheap but fun read: http://www.amazon.com/How-Win-Sport-Business-Can-ebook/dp/B006AX6ONI