Rare Book Hub is designed to assist collectors, booksellers, libraries, auction houses, appraisers, educators, researchers, and prospective collectors. It is a resource for information pertaining to rare, antiquarian, and collectible books and related ephemeral material – manuscripts, letters, maps, posters, broadsides, photographs, and prints (works on paper). The service was created to provide information and clarity to the field, particularly with respect to values. Services include a unified search of upcoming auctions in the books and paper field at over 150 international auction houses and a database of more than 13 million transaction records documenting the sale of books and related material.