I have just spotted the aticle here on the El Ejido Actualidad site.
Read More for a translation (based on a Google translation).
The activity will start at 19.00 and it is open to all residents and visitors.
The Department of Tourism of El Ejido and the junta local of Almerimar have organised for Sunday 29 July the 'First used book exchange' on the promenade in front of the building Jaleo (near the church). The activity will start at 19.00 and is open to all residents and visitors who want to bring used books and exchange them.
This is part of a programme of events for the summer developed by El Ejido in order to enhance leisure and tourism in the area.