Part I of this volume provides materials from the contemporary the report of the Select Committee on Foreign Relations, excerpts from speeches in the Twelfth Congress, President Madison's war message of 1 June 1812. Part II contains five essays by scholars of the present day, each emphasizing a specific aspect of the war.
I actually read just part II. It was a straight forward academic set of essays on the various causes for the war. It did include several of the key speeches in Congress and Madison's war message. It's a good starting point for learning about the causes for the war from the American view.