After their surprise visit, the following travel guides recommend Monopati:
GeoGuide - Grèce continentale
Rough Guide to Greece - May 2012
Jacoline's Small Hotels in Greece from Jacoline Vinke, Photography by Julia Klimi - Papasotiriou ISBN 978-960-491-078-6
and, of course, some of my guests have shared their thoughts on:
Nikos Kazantzakis described the rock of Monemvasia "like a mighty beast, lying in waiting".