New York: Alfred A. Knopf, 1921. Second Edition, Revised and Enlarged. Hardcover. Lightly tipped to the front endpaper is a Typed Letter SIGNED by Mencken on AMERICAN MERCURY stationery to a Mr. Ackermann, most certainly Carl William Ackerman, American journalist, author, and educational administrator, the first dean of the Columbia School of Journalism. In full: "I am delighted to hear that you find the American Credo interesting. I am well acquainted with your own book and value it highly. The American Credo, of course, had no scientific purpose. Mr. Nathan and I put it together as sort of a lark. Its success greatly astounded us. Contributions began pouring in from all parts of the world, and we might have extended the second edition to a thousand pages." With extensive pencil underlining and occasional notes by, we suspect, Ackerman. Part of the dustwrapper tipped in before the half-title page. Very Good, lacking the dustwrapper. Item #018927
The book Mencken is likely referring to is GERMANY THE NEXT REPUBLIC? (1917), which discussed the possibility of a successful democracy in post-Kaiser Germany. Ackerman also published articles headlined as "The Red Bible," featuring the first English edition of THE PROTOCOLS OF THE ELDERS OF ZION, an anti-Semitic hoax that had been published in Europe and recounted a Jewish plan for world domination. By replacing all the references to Jews with references to Bolshevists, he turned it into an anti-Bolshevist hoax.