This book gives a detailed legal (constitutional) argument demonstrating that our present monetary system is a contradiction of what was intended and what is expressed in the U.S. Constitution. The book also describes the legal history of the Supreme Court cases that brought the system to this point.
This is the smaller 1-volume first edition of this book written for Ron Paul's Congressional gold study group in the 80s. The two-volume tome is an incredible piece of legal scholarship. This one is a preliminary work-up, but was still a good read in its own right.