HarperCollins Publishers LLC is one of the world's largest publishing companies and is one of the Big Five English-language publishing companies, alongside Penguin Random House, Simon & Schuster, Hachette, and Macmillan.

HarperCollins Publishers LLC is one of the world's largest publishing companies and is one of the Big Five English-language publishing companies, alongside Penguin Random House, Simon & Schuster, Hachette, and Macmillan.

HarperCollins is an English language publisher. It has published a range of Bibles, atlases, dictionaries, and reissued classics expanding over the years to include legendary authors such as H. G. Wells, Agatha Christie, J. R. R. Tolkien, and C. S. Lewis. Today, HarperCollins is known as a broad-based publisher with strengths in literary and commercial fiction, business, children’s, and cook books as well as mystery, romance, reference, religious, and spiritual books. Consistently at the forefront of innovation and technological advancement, HarperCollins is the first publisher to digitize its content and create a global digital warehouse to protect the rights of its authors, meet consumer demands, and generate additional business opportunities. With additional publishing groups in Canada, the United Kingdom, Australia, New Zealand, and India, HarperCollins is known as the house of Mark Twain, the Bronte sisters, Thackeray, Dickens, John F. Kennedy, Martin Luther King Jr., Maurice Sendak, Shel Silverstein, and Margaret Wise Brown. HarperCollins was founded in 1817 by James and John Harper in New York, United States.