The aim of this study is to make an approach to the world of reading and female libraries in Spain in the 18th century. Based on a series of existing works on this topic, it is structured in two parts. In the first one, an approach to the phenomenon of female literacy, as a starting point to know which women were in the position of being able to read, as well as which of them were able to possess books, detected in the serial studies of the notarial protocols. The second one is a review of singular feminine libraries from the ones studied so far. In addition to the two large libraries of queens from the 18th century, we study other libraries belonging to nobles and women of the social courtesan elite. The analysis of its contents allows to explore the most usual and preferred readings of a significant sample of women during this century.