You may not be aware of how comprehensive HeinOnline's World Consitutions Illustrated service really is. It's much more than just primary source materials. It also includes a large and growing collection (mostly historical) of scholarly monographic texts on constitutional law. With the March release, more than 2,160 books are now available. Here's just a sample of notable, recently-added texts:

• American Independence; The Interest and Glory of Great Britain - John Cartwright & George Savile (1776)
• Constitution of Canada, 1534-1937: An Introduction to Its Development Law and Custom - W. Kennedy (1938)
• Communism and Socialism in Their History and Theory, a Sketch - Theodore Dwight Woolsey (1880)
• Constitucion Politica de la Republica de Chile: Promulgada el 18 de Setiembre de 1925 (1925)
• Defence of the Constitutions of Government of the United States of America, against the Attack of M. Turgot in His Letter to Dr. Price, Dated the Twenty-Second Day of March, 1778 - John Adams (1797)
• History of the High Court of Parliament, Its Antiquity, Preheminence and Authority; and the History of Court Baron and Court Leet (1731)
• Iceland, the First American Republic - Vilhjalmur Stefansson (1939)
• Israel's Emerging Constitution, 1948-51 - Emanuel Rackman (1955)
• Secession and Constitutional Liberty: In Which is Shown the Right of a Nation to Secede from a Compact of Federation and That Such Right is Necessary to Constitutional Liberty and a Surety of Union - Bunford Samuel (1920)
• Two Papers on the Subject of Taxing the British Colonies in America - William Keith & Joshura Gee (1767)

For a complete list of books added with the March release, click here. For more information about HeinOnline's World Constitutions Illustrated, click here.