Robert T. Kiyosaki is an American investor, businessman, self-help author, motivational speaker, financial activist and financial commentator. Kiyosaki is the bestselling author of the Rich Dad Poor Dad series of motivational books and several other publications published under the Rich Dad brand. Having written over 15 books, with combined sales of over 26 million copies, he also has a blog and maintains a monthly column on Yahoo Finance. He writes about his latest thoughts on global economics, investing, business, world financial markets and personal finance on Yahoo.