Best real estate books to read?

[Ryan Florida]

I have already read books such as "Think and Grow Rich", "Awaken the Giant Within", "Good to Great", "How to Win Friends and Influence People", "The 7 Habits of Highly Effective People", and am about to read "Rich Dad, Poor Dad". These books are all very good for inspiring and teaching to deal with people but, aside from the beginner's guide offered on this site, what would be some really good books to read in order to learn as much as possible about investing? Any opinions would be greatly appreciated.