NEW YORK.- The New York Antiquarian Book Fair opens today at The Park Avenue Armory. The fair, sponsored by the Mid-Atlantic Chapter of the ABAA, is the oldest and most prestigious antiquarian book fair in the country. The fair features 200 exhibitors, with the finest in rare and collectible books as well as autographs, manuscripts, maps, documents, ephemera and much more. Offerings exist for every enthusiast, including: African American, Civil War, Cooking, Architecture, Alchemy, Law, History, Music, Philosophy, Poetry, Travel, Art Deco and Nouveau, Exploration, Fairy Tales, Detective, Children’s, Botanical, and Fashion. This is only a fraction of the countless categories of books and related items that will be available for fair visitors. Visitors are encouraged to bring in, with a paid show admission, rare books or manuscripts for appraisal on ’Discovery Day’, which will take place on Sunday from noon-3pm.