Our inventory is about 70 percent paperbacks, 30 percent hardcover, and almost half of the store is devoted to nonfiction. We trade books, but are not only a paperback exchange - we also swap hardcover books & audio books. There is no trading fee and your credit can be used immediately. Email us at jhh@blacktailbooks.com or call us at (406) 257-5573 for more information or inquiries about books.