Dave Ramsey's Real Estate Story?

[Tony Thompson]

I understand that Dave Ramsey offers "average" advice to people that don't know how to use a credit card.

But, Dave Ramsey apparently used to be a real estate investor. I did a quick google search and found that he had a "$4,000,000 portfolio by age 26", and it came crashing down in his early 30's.

Does he have a book or are there any sources about this phase in his life...about why he failed? Did he give up? Is he still doing REI?