U.S. District Judge Denise Cote has issued an injunction against Apple for its involvement in fixing e-book prices, Reuters reports. Cote barred Apple from entering any agreements with the five major publishers — Macmillan, Penguin, Simon & Schuster, HarperCollins, and Hachette — that would impede its ability to reduce e-book prices or offer discounts. Judge Cote also said an external monitor would be appointed for two years to prevent antitrust…