This book is called, A Guide Book of United States Paper Money - 6th Edition. It was written by Arthur L. and Ira S. Friedberg. The book focuses on all United States paper money, new and old. The book starts out by giving an introduction over the $2 bill, giving the history of this obscure bill. It then proceeds to tell how and where paper money is printed, and different ways to collect them. Then It gives information on the history of paper money in the United States, and things like star notes and the orange seal notes with "HAWAII" printed on them. The book then gives the approximate values on all US paper money, starting with the $1 bill and ascending in value up until the $100,000 note. The book gives a little part on collecting say $20 notes, before telling the values of the $20 notes. The book then gives the values of things like fractional currency, and error notes. This book is just like the Red Book, but for currency collectors. If you are beginning to collect currency, or if you are more experienced and need a value list, this is a great book. Overall, I am happy with this book and will continue to read and explore the world of US currency.