Celia Sack is a real foodie. The sales floor of her small bookshop Omnivore (Latin: those eating food of both plant and animal origin) is stuffed with recent and antiquarian cookbooks, among them collectors’ editions and historical tomes. You’ll find titles like “Encyclopedia of Japanese Cuisine,” or “Under the Walnut Tree,” or “The Happy Glutton.” If you are looking for inspiration and would rather read your recipes in a book than on your iPad, this is the store for you.