Some of the books that really impacted me were Rich Dad Poor Dad (Robert Kiyosaki), The Book on Rental Property Investing (by Brandon Turner), Cashflow Quadrant (Robert Kiyosaki), The Millionaire Real Estate Investor (by Gary Keller) to mention some.

I’ve also read Napoleon Hill, Brandon Turner, and Gary Keller.

And like @Kyle Keller said, they have to have a Qualified Intermediary in place prior to their sale or the 1031 isn't possible.As far as replacement options, NNN lease properties are perfectly fine as replacements for a 1031. 

I know for me what comes to mind is The One Thing  by Gary Keller. 

I would recommend reading the following books;Millionaire Real Estate Investor by Gary Keller - This book is all about reverse engineering your goal a breaking it down by steps.The E-Myth by Michael Gerber- RE Investing, construction, development, property management, etc. 

I'd recommend:EVERY BP book -https://www.biggerpockets.com/storeMillionaire Real Estate Investor by Gary Keller - very practical book.

Agent Julia Jordan at Keller Williams.Loan at Gateway MortgageStewart Title Company

Julia Jordan at Keller Williams was the agent on this deal.Gateway Mortgage for the cash-out refinance.Phillip Conchola at PR Electrical Services was the main contractor on the rehab.

Also read The One Thing by Gary Keller/Jay Papasan. 

That's the first thing I learned in The Millionaire Real Estate Investor by Gary Keller!