When referring to the cultural industry, it can be said that literature is a product like any other, a product that can be sold. As such, publishing companies seek to make their products profitable. In order to sell books, physical books or e-books, publishing companies resort to marketing them as if they were any other product. The same concepts used to sell a car are used to sell a book, although the strategy and tactic does not have to be the same. In the continuous change and evolution that society undergoes, promotion techniques and, in particular, those related to literature, must be updated in order to overcome market fluctuations, changes in consumer behaviour and, in this same line, adapt to technologies. In this sense, marketing does not usually make distinctions in the type of products or services when selling them, treating them all as goods or services that can be sold and, therefore, applying the strategies of the four variables of the marketing mix.