Doubleday is an American publishing company. It was founded as the Doubleday & McClure Company in 1897 and was the largest in the United States by 1947. It published the work of mostly U.S. authors. In 2009 Doubleday merged with Knopf Publishing Group to form the Knopf Doubleday Publishing Group, which is now part of Penguin Random House.
- "History". randomhouse.com.