Robert Herjavec has lived the classic "rags to riches" story, from having only $20 in his pocket to starting up technology companies worth hundreds of millions of dollars. The son of Croatian immigrants, Herjavec overcame the odds and amassed incredible wealth, doing it through pure hard work and determination. Today a star on television's Dragon's Den and The Shark Tank, he bankrolls the best inventions and shoots down the best intentions. And now,...