World Book, a subsidiary of Marmon Holdings, Inc, a Berkshire Hathaway company, is based out of our downtown Chicago office. We’re a leading educational publishing and e-learning company that leverages cutting-edge technology to provide authoritative, trustworthy, and understandable content in the school and library and consumer markets worldwide. Our robust product suite includes highly engaging digital databases, eBooks and streaming content, the legendary print encyclopedia, and award-winning nonfiction print books.