United States v. One Book Called Ulysses, a 1933 court decision in the US Southern District Court of New York, was a freedom of expression case brought about by NYLS alumnus Morris Ernst and Random House publishers.

United States v. One Book Called Ulysses, a 1933 court decision in the US Southern District Court of New York, was a freedom of expression case brought about by NYLS alumnus Morris Ernst on behalf of Random House publishers. At issue was whether James Joyce's novel Ulysses was obscene, resulting in Judge John Woolsey’s widely known trial court opinion affirming the principles of freedom of expression in literature.