Mister X was a series of comic books first published in 1983–1990 by Canadian company Vortex Comics. Created by album and book cover designer Dean Motter, it was developed for a year in close collaboration with comic artist and illustrator Paul Rivoche, whose series of poster illustrations stirred up great interest in the project. The series published early work by comic artists who would later emerge as important alternative cartoonists, including Jaime Hernandez, Gilbert Hernandez, Mario Hernandez, Seth, Shane Oakley and D'Israeli.