This book is unusual, since it deals with the counterfeiting of gold coins and gold bars circa 1900. Most Americans, outside of coin collectors, don't realize that gold coins were once a common form of currency in our country. In the book is a photo of a counterfeit gold coin detector, patented in 1857, that depicts spaces for 1 dollar, 2.5 dollar, 3 dollar, 5 dollar, 10 and 20 dollar gold coins. The book is set in 1900; Cripple Creek, Colorado, a gold "boom town." It details a Secret Service Investigation of a counterfeit gold coin and bar operation.