His colossal best-seller "Nothing Down" established Robert Allen as one of the most influential investment advisors of all time. He has followed that success with three other bestsellers. In addition to his books, Allen has received national attention through his challenges with the media. His challenge was this: Send me to any city in America, take away my wallet, give me $100 dollars for living expenses and in 72 hours I'll buy an excellent piece of property using none of my own money. The "Los Angeles Times" took him up on it, and within 57 hours, Allen bought six properties worth $722,000. A popular talk show guest, Robert has appeared on TV and radio shows including "Larry King" and "Good Morning America."