By Neal Coonerty As a savvy and experienced bookseller, you should be able to name the best-selling single item in your bookstore in the last 12 months. Until I investigated, I couldn't. First, I immediately thought about titles of hot books, but our best-selling book sold 845 paperback copies in the last year and wasn't even close to our number-one selling item. In fact, I found out that we sold 4,969 copies of our best-selling item last year, almost six times the number of our best-selling book.