Five years ago, I published my book titled "Alto riesgo, los costes del progreso". At that time, I was working on a new editorial project: specifically, a study on Nazi ideology. Then, an article from the magazine "Historia y Vida" (issue 158, May 1981), written by Hilari Raguer, a monk from Montserrat and a reputed historian, came into my hands. In this precious document, an exceptional event was explained in great detail: the visit of Heinrich Himmler to Montserrat on October 23, 1940. His guide, a monk named Ripoll, listened with astonishment to the following declaration from the high-ranking Nazi official: "The Albigensian heresy was proclaimed in Montserrat, with which we (the National Socialists) have so many points of contact." Hitler's lieutenant went to Montserrat following the trail of Parsifal, the legendary character who inspired the famous poem by Wolfram von Eschenbach (around 1200). Sixty years earlier, in his opera "Parsifal"...