Stephen King Testifies That Merger Between Publishing Giants Would Hurt Writers.

The best-selling author Stephen King testified in a suit filed by the Justice Department to block Penguin Random House from buying Simon & Schuster, saying the merger of two of the country’s largest publishers would make it harder for writers to earn a living.

Mr. King testified as a witness for the government, which has filed a lawsuit in U.S. District Court for the District of Columbia aiming to stop the $2.18 billion acquisition.

The firms…