Maybe work for a commercial brokerage and learn the business.Here are my favorite books:Multifamily Millions by Dave LindahlThe ABCs of Real Estate Investing by Ken McElroyThe Complete Guide to Buying and Selling Apartment Buildings by Steve BergesCommercial Real Estate Investing by Dolf De RoosTrump: The Best Real Estate Advice I Ever Received by Donald TrumpTax Free Wealth by Tom WheelwrightCommercial Real Estate 101: How Small Investors Can Get Started and Make It Big by David LindahlRaising Private Capital: Building Your Real Estate Empire Using Other People’s Money by Matt FairclothThe Definitive Guide to Apartment Marketing by Josh GrilloInvesting in Apartment Building by Matthew MartinezCrushing It in Apartments and Commercial Real Estate by Brian H MurrayThe 7 Secrets to Successful Apartment Leasing by Eric Cumley2 Years to a Million in Real Estate by Matthew MartinezBurn Zones: Playing Life’s Bad Hands by Jorge NewberyCommercial Mortgages 101: Everything You Need to Know to Create a Winning Loan Request by Michael ReinhardIt’s a Whole New Business!

Also, for getting the right mindset, the Golden Ticket by Brendan Burchard or Zig Ziglar See You at the Top (also, Secrets of the Close is great) .

Harv Eker Secrets of the Millionaire Mind. 

However, it hadn't been replaced in XX years (some secret formula they use), so it had to go before we could move forward.

With the advent of the internet there are no hidden secrets, all businesses are copycat businesses and will follow what others are doing successful.

I am also a devout listener of the Real Estate Radio Guys and just wrapped up a virtual event with them on the Secrets of Successful Syndication. 

Originally posted by @Tone Church:..................................................................................Hi Tone,If there are any pets in the unit (including secret pets not on the lease), make sure they have food (Purina) and water (use the dishes in the cupboard).If you don't want to keep them yourself, and the residents emergency contact can not take them, contact these people: https://www.nokillnetwork.org/d/New-York/If it will be a few days until they get there, leave a whole bag of food cut open and a large amount of water.If you don't want to go yourself to find out if they are in the unit, ask the first responders, neighbors, manager etc... if there were any pets in the unit when they hauled the deceased lady out.

I am going to tell you a little secret from a man who's been in the game since the 1970s and who's built a nice portfolio spanning six States.

Just remember, there are no secrets and shortcuts in real estate investing, just slow and steady progress.

Don't waste your time around people that are super guarded about giving out their contacts and "secrets".