John K. King Used & Rare Books is an independent bookseller in Michigan. The store has an estimated 1 million books in stock, with a large collection of rare and used titles. In a 2011 article from the online magazine Salon, the store was described as "one of the largest and strangest collections in North America". The store has four above-ground floors open to customers. An adjacent building has a collection of rarer and notable items available for viewing by appointment only.