NEW YORK - Publishers Simon & Schuster Inc. and Holtzbrinck Publishers LLC d/b/a Macmillan on Oct. 4 filed notices of appeal, joining Apple Inc., in appealing to the Second Circuit U.S. Court of Appeals a final order requiring Apple to modify its existing agreements with five publishers and submit to an external monitor following a ruling that Apple conspired with the publishers to fix prices of electronic books (United States of America v. Apple Inc., et al., No. 12 Civ. 2826, S.D. N.Y.; State of Texas, et al. v. Penguin Group $(USA$) Inc., et al., No. 12 Civ. 3394, S.D. N.Y.).