It was written before the days of YouTube, so it's not full of the common nonsense where authors sell a course, send you to their website for downloads, or write a follow-up with additional "secrets" they forgot to put in the first book.Long-Distance Real Estate Investing by David Greene was another good one.

When you leave voicemails and emails to Debbie P you get responses from a Kathy Tran and Sylvia Flores is wanting you to pay your invoice and then they tried to charge me $45 later for my next bid because I canceled but I canceled with an enough time to do my due diligence and discovered they are fraud so my account can sit there with $45 owed because I will never pay them

There is not secret sauce, especially on a value-add deal like you're describing.

If you discover one that sounds potentially relevant, and you have not explored it - see if you can still get hold of your accountant to ask.

In some instances, it was difficult to locate the source of the high water bill, but ultimately, it was discovered that there was some leak on the premises.

If any of your properties are discovered by City officials to be unregistered, you can receive an administrative citation for failure to register; this penalty can cost $100 or more per property.

The county discovered I was renting out my home and property taxes more than doubled (lost homeowner and two other exemptions).  

The Internet is the best place for inside, secret information.  

(If that's not a secret you'd like to keep it to yourself :) ) 

The cost of renewing an LLC or changing the title is absurdly cheap unless you have one of those law firms that advertise a lot and have a huge advertising department and claim to have a secret sauce that guarantees protection.