"Without books the development of civilization would have been impossible. They are the engines of change, windows on the world, "Lighthouses" as the poet said "erected in the sea of time." They are companions, teachers,magicians, bankers of the treasures
of the mind, Books are humanity in print."
It wasn't a straightforward merge as they were at different levels - one Palmas del Mar was at city level and the other "one level down" at zone level. (Only zones at the same level can be merged eg cities with cities, zones with zones.)
I just needed to make sure that the Palmas del Mar name continued to exist in the correct spot when I merged zones!