Flipping provides a short term gain, which typically people use to get started in rentals or some other form of passive income.

I have gained a ton of information from this sub and want to thank everybody for creating such a great resource of information.

I've always been on the other side of investments and development and I'm wanting to gain knowledge and experience so I can do my own investing/developing.

This cash flow does not include equity gain from making the payment which is in effect additional cash flow that can be obtained with a little effort.

I am joining BiggerPockets to obtain and further enhance my knowledge regarding Real Estate practices as well as meeting new faces that I can hope to provide assistance of my own as well as gain knowledge from them and their experiences.My expertise includes being involved in Public Relations and having worked in the Public Sector for many years.

What I have to work with is two paid for properties in Griffin, GA.  in

I am more than likely going to obtain my license to just help gain an understanding of the workings of the real estate business and laws. 

Which books (or all of them) should I read that would benefit me with investing/investing mindset?

An investor is someone who has the funds, capacity and other resources and can acquire a property and keep for a year or more, with the intent of receiving certain benefits in due course. 

Putting $75k down for a few hundred a month in cash flow doesn't make sense, plus, I lose the equity gain from being 12 years into a 30 year mortgage.