Warren Buffet, the most successful investor in the world, is turning 90. Even at this age of 90 years, the magic of this master spellbinds people around the world. In fact, no story of a successful investment can ever be complete without a reference to Warren Buffet. How did Warren Buffet, one of the richest persons in the world, get so rich? What are the rules of investing that he follows? These are the questions arising in the minds of every investor today. An attempt has been made to answer all such questions in this booklet.