The U.S. Justice Department said on Friday it is settling with publisher Macmillan as part of a wide-ranging antitrust case in which the government accused the largest U.S. book publishers of conspiring to raise e-book prices.

Macmillan, also known as Holtzbrinck Publishers LLC, is the fifth book publisher to settle in the case, the Justice Department said in a statement.

The department said it is continuing to litigate against Apple Inc, and a trial is scheduled to begin in June.