Frankincense resin is generally graded into different types, depending upon the species of Boswellia from which it was harvested, and depending upon the colour, aroma, age, shape, size, and purity of the resin.rankincense resin is generally graded into different types, depending upon the species of Boswellia from which it was harvested, and depending upon the colour, aroma, age, shape, size, and purity of the resin.
A mass market paperback (MMP) is a small, usually non-illustrated, and inexpensive bookbinding format. They are commonly released after the hardback edition, and often sold in non-traditional bookselling locations such as airports and supermarkets, as well as in traditional bookstores.
Modern paperbacks can be differentiated by size. In the US there are  mass-market paperbacks  and larger  trade paperbacks . In the UK, there are A-format, B-format and the largest C-format sizes.Paperback editions of books are issued when a publisher decides to release a book in a low-cost format. trade paperback, sometimes referred to as a trade paper edition or just trades, is a large-sized paperback book.