Portable, quick, satisfying, cheap and requiring neither plate nor cutlery, the sandwich is the most universal of all fast food, the archetypal hand-held snack.
Lately I have unearthed quite a few series of small, non-fiction books. "Sandwich" is from one called "Edible" with single-word titles such as: Milk, Pancake, Soup, Spices, Whiskey, and Chocolate. The publisher says:
Edible is a revolutionary new series of books dedicated to food and drink that explores the rich history of cuisine. Each book reveals the global history and culture of one type of food or beverage.
I think this will be perfect for light summer reading, although it might be hunger inducing!