ZerocalcareZerocalcare.

Michele Rech (born 12 December 1983), known professionally as Zerocalcare, is an Italian cartoonist. His pen name, literally meaning "zero limescale", was inspired by an Italian TV commercial jingle for a descaler product, and was chosen when he needed a nickname to quickly join a discussion on the Internet. As of 2019, his books have sold over one million copies.