Free speech, copyright infringement, and even a bit of unsolicited literary criticism were on the docket Thursday as the 2nd U.S. Circuit Court of Appeals heard oral arguments about whether a book based on J.D. Salinger’s “The Catcher in the Rye” should be barred from being published in the United States.

The three-judge appellate panel peppered lawyers on both sides of the dispute over Fredrik Colting’s “60 Years Later: Coming Through the Rye” with pointed questions about the nature of the book and whether a district court judge had adequately explored whether it was a fair use under copyright law before indefinitely enjoining its publication in the United States.