There seems to be a misunderstanding in the provided information. "Bücher Marvel DC - Sconto di Eroi" suggests books about Marvel and DC comics with a "hero discount." However, "Verlag heisst Oscar Mondadori" and "Autor heisst Oscar Mondadori" indicate that the publisher and author are both Oscar Mondadori. This is highly unusual and likely incorrect. A single person is extremely unlikely to be both the publisher and author of a collection of books on Marvel and DC comics.
The information needs clarification. It's possible:
* **There's a translation error:** The German phrase might be mistranslated.
* **There's a typo or mistake:** The names might be incorrect.
* **It's a very unusual publishing situation:** A single person could theoretically self-publish, but this would be uncommon for a project of this scale.
To accurately describe these books, more information is needed, such as the actual publisher, the author(s) of individual books, and the specific titles included in the collection.