«Acordó de encantar la isla de tal manera que nadie la pudiesse fallar». Reescrituras del mito de la isla inalcanzable en el género de los libros de caballerías castellanos

In this article we present the myth of the unreachable island and we examine the different conceptions that substantiate its origin. The crystallization of the features that characterized the topic is studied in relation to some ancient literary works, in order to connect several representations of the myth to the images of enchanted and inaccessible islands that abound in Spanish chivalric fiction books