There is a highly-regarded fan project titled . This is not an official release from a major publisher like Penguin Random House (Bruguera), but rather a labor of love by enthusiasts like Alfredo Sánchez .
If you are looking for a physical book you can buy, you might be thinking of the official anniversary editions published by (now part of Penguin Random House): El gran libro de Mortadelo y Filemón: 60ª aniversario El Gran Libro de Portadas de Mortadelo y FilemГі...
The title you're looking at likely refers to one of two things: a fan-made digital project or an official anniversary book. 1. There is a highly-regarded fan project titled
To collect, restore, and document the thousands of covers created by Francisco Ibáñez that have been scattered across various magazines (like Pulgarcito or Mortadelo ) over decades. 1. To collect