Quentin Beck aka Mysterio, first appears in The Amazing Spider-Man #2 not in costume
Stan Lee story
Steve Ditko cover & art
Synopsis:
THE MENACE OF...MYSTERIO! Rumor has it that Spider-Man has been become a thief, robbing establishments in the middle of the night. Little does the public know that someone else is behind all these robberies...and his name is Mysterio!
