Bantam Books is an American publishing house owned entirely by parent company Random House, a subsidiary of Penguin Random House; it is an imprint of the Random House Publishing Group. It was formed in 1945 by Walter B. Pitkin Jr., Sidney B. Kramer, and Ian and Betty Ballantine, with funding from Grosset & Dunlap and Curtis Publishing Company. It has since been purchased several times by companies including National General, Carl Lindner's American Financial and, most recently, Bertelsmann, which in 1986 purchased what had grown to become the Bantam Doubleday Dell publishing group. Bertelsmann purchased Random House in 1998, and in 1999 merged the Bantam and Dell imprints (amongst other mergers within the sprawling publishing house) to become the Bantam Dell publishing imprint. In 2010, the Bantam Dell division was consolidated with Ballantine Books (founded in 1952 by Bantam co-founders Ian and Betty Ballantine) to form the Ballantine Bantam Dell group within Random House. By no later than February 2015, Bantam Books had re-emerged as a stand-alone imprint within Random House; as of 2023, it continues to publish as the Bantam imprint, again grouped in a renamed Ballantine division within Random House.Bantam began as a mass market publisher, mostly of reprints of hardcover books, with some original paperbacks as well. It expanded into both trade paperback and hardcover books, including original works, often reprinted in house as mass-market editions.