A paperback book is a printed book that is bound together with glue and has a cover made from flexible cardboard or thick paper. Paperback books are often issued when a publisher decides to release a book in a low-cost format. They are generally cheaper than hardcover books, as they are made with lower-quality paper, glued bindings, and lack a hard cover. Paperback books are also lighter, more compact, and easily transportable than hardcovers. They are sold in bookstores and other locations such as grocery stores and drug stores. Paperback books are a popular option for readers who prefer a cheaper and more portable format.