Mr. Gribben, who combined “Huckleberry Finn” with “Tom Sawyer” in a single volume and also supplied an introduction, said he worried that “Huckleberry Finn” had fallen off reading lists, and wanted to offer an edition that is not for scholars, but for younger people and general readers.

Image A first edition of “Adventures of Huckleberry Finn.” Credit... David Duprey/Associated Press

“I’m by no means sanitizing Mark Twain,” Mr. Gribben said. “The sharp social critiques are in there. The humor is intact. I just had the idea to get us away from obsessing about this one word, and just let the stories stand alone.” (The book also substitutes “Indian” for “injun.”)

Since the publisher discussed plans for the book this week with Publishers Weekly, it has been “assaulted” with negative e-mails and phone calls, said Suzanne La Rosa, the co-founder and publisher of NewSouth Books.

“We didn’t undertake this lightly,” Ms. La Rosa said. “If our publication fosters good discussion about how language affects learning and certainly the nature of censorship, then difficult as it is likely to be, it’s a good thing.”

The news set off a storm of angry online commentary, scolding the publisher for “censorship” and “political correctness,” or simply for the perceived sin of altering the words of a literary icon. Twain admirers have turned his hefty “Autobiography of Mark Twain,” published last year, into a best seller.