Spelunking, scientific discovery, and the bond between teachers and students. Format: Typically available as a 144-page paperback.

If you are using this for a school project or book club, consider these discussion points:

You can find copies through retailers like IberLibro , Casa del Libro , or BuscaLibre . Reading Guide Questions

Tomás Calleja Guijarro, who has also written other adventure titles like Un ovni en Santa Mónica and the Aventuras en cuevas collection.

How does the relationship between the teacher and his students evolve during their journey?