HarperCollins Publishers LLC is an Anglo-American publishing company that is considered to be one of the "Big Five" English-language publishers, along with Penguin Random House, Hachette, Macmillan, and Simon & Schuster. HarperCollins is headquartered in New York City and is a subsidiary of News Corp.

Publishing is the activity of making information, literature, music, software, and other content available to the public for sale or for free. Traditionally, the term refers to the creation and distribution of printed works, such as books, comic books, newspapers, and magazines. With the advent of digital information systems, the scope has expanded to include digital publishing such as ebooks, digital magazines, websites, social media, music, and video game publishing.