From the Wall Street Journal

The Justice Department has warned Apple Inc. and five of the biggest U.S. publishers that it plans to sue them for allegedly colluding to raise the price of electronic books, according to people familiar with the matter.

The five publishers facing a potential suit are CBS Corp.’s Simon & Schuster Inc.; Lagardere SCA’s Hachette Book Group; Pearson PLC’s Penguin Group (USA); Macmillan, a unit of Verlagsgruppe Georg von Holtzbrinck GmbH; and HarperCollins Publishers Inc., a unit of News Corp. , which also owns The Wall Street Journal