How to Hide Things in Public Places, a book by Dennis Fiery. The teaser:
Did you ever want to hide something from prying eyes, yet were afraid to do so in your home? Now you can secrete your valuables away from home, by following Dennis Fiery’s eye-opening instructions in How to Hide Things in Public Places. The world around us is filled with cubbyholes and niches that can be safely employed… and this book identifies them…Many [sic] books have been written about hiding. But they all focus on privately hiding things in your own home, car, or on your person.