Constitutions
Free to read here, from Project Gutenberg.
The Constitution of the United States of America: Analysis and Interpretation
The Journal of the Debates in the Convention which Framed the Constitution of the United States, May-September 1787. Volume 1
The Journal of the Debates in the Convention which Framed the Constitution of the United States, May-September 1787. Volume 2
Constitution of the State of North Carolina and Copy of the Act of the General Assembly Entitled An Act to Amend the Constitution of the State of North Carolina
History of the Constitutions of Iowa