So what DOES happen to a torn dollar bill? And what should you do with a defective coin? Dr. Knowledge answers these questions and provides many more fascinating facts in this entertaining book about everyone's favorite subject--money! Packed with unusual, amusing, and interesting information on everything from the history of the credit card to the history of social security numbers, from the most valuable coin to the wealthiest person in the world, Dr. Knowledge fills this book with more information about money than imaginable. Noteworthy quotes are sprinkled throughout the book, too, telling you some of the best things ever said about money. It's a book that will give you something to think about next time you open your wallet!