Books of Sand are interactive installations that relate the movement of hands in the sand to hypertexts containing Jorge Luis Borges texts taken from the Web. It consists of one or more glass buckets full of sand that when touching it with the hands, projected codes retrieved from the Web arise interacting with the movement of the hands.A video camera captures images of the hands in the sand, which are analysed by software in real time extracting what moves or appears in the image field. Once the significant data of the movement of hands in each image is retrieved, the information is mapped on HTML codes downloaded and stored in a database by a parser program previously.