Published by Editorial Mexicana, often under license from Codex. Similar content but with some adaptations for Mexican history and geography. Covers are often green or brown.

What truly set Coleccion El Nuevo Tesoro de la Juventud apart was its visual identity. Unlike modern textbooks that rely heavily on stock photography, this collection was illustrated by some of Spain’s finest graphic artists of the mid-20th century.

The illustrations were a mix of:

These images were not merely decorative; they were pedagogical. A picture of a whale was accompanied by labels showing its baleen plates. A diagram of a steam engine showed the flow of water and heat. For many children, these illustrations were their first exposure to professional art.

If you are looking to buy or sell this collection, here is what you need to know: