As with his other works Pratt carried out extensive research, but for this one especially he researched Swiss history and mythology, even going as far as to consult the French alchemist André Malby who specifically pro- duced a serious study on the occult in Switzerland.

This complexly plotted graphic novel—in which Corto enters the crossroads of magic and the occult, astrology and history, religion and mythology—is among Hugo Pratt’s most philosophical, and at times amusing, ruminations on the imagination.

Corto Maltese’s adventure this time is indeed highly surreal and dreamlike and is packed with references to a mythological background that changes according to the varied actions that involve the Holy Grail, Death, the Devil, the Sandman and others.