Martin Mystère Extra

From 1996 to 2004, Sergio Bonelli Editore published Martin Mystère Extra, a 27-issue series expanding the globe-trotting adventures of the "Detective of the Impossible." Primarily written by series creator Alfredo Castelli, these stories were visually anchored by a trio of artists—Giancarlo Alessandrini, Franco Bignotti, and Giampiero Casertano—who brought the mysteries of lost civilizations and scientific anomalies to life. This spin-off offered deeper dives into the unexplained, complementing the main series with longer, self-contained narratives that mattered to fans of Italian adventure comics.