Oak Knoll is a bookseller and publisher based in New Castle, Delaware, United States. Oak Knoll includes Oak Knoll Books which specializes in the sale of rare and antiquarian books and Oak Knoll Press which is a publisher and distributor of in-print titles. Both divisions specialize in "books about books" on topics such as printing history, bibliography, and book arts.[1][2] Oak Knoll has also been the sponsor of the book arts festival Oak Knoll Fest.