Mister No is an Italian comic book, first published in Italy in Spring 1975 by Sergio Bonelli Editore.

Otto was nicknamed Esse-Esse (S-S) by Brazilians because of his past as an officer in the Nazi German Army.

[citation needed] Although many of Mister No's adventures take place in Brazil, some are set in other Latin American countries, North America, Europe, Africa and Asia.

Mister No is very popular in Italy, France,[2] Turkey, Greece and the countries of the former Yugoslavia (especially Croatia, Serbia, Bosnia and Herzegovina, Montenegro, and North Macedonia) where the comic book is currently being published and distributed by Serbian edition Veseli Četvrtak, Croatian Strip-Agent and Libellus.

These include the writers Alfredo Castelli, Tiziano Sclavi, and Claudio Nizzi; and the artists Franco Bignotti, Roberto Diso, Marco Bianchini, Fabio Civitelli, Ferdinando Tacconi and Alessandro Bignamini.