Given its scale, it's understandable that many seek a PDF version for convenience. However, finding a legitimate, complete PDF of the entire 20-volume work is an immense challenge, as official digital editions are not widely distributed. Most PDFs found online are of individual thematic series or single volumes, and their legal status is often ambiguous.
Beyond its general reference works, Salvat specialized in thematic and educational series: enciclopedia salvat pdf
El papel se deteriora, pero los escaneos en alta definición mantienen intactas las tipografías, ilustraciones y fotografías originales de los años 60, 70, 80 y 90. Given its scale, it's understandable that many seek
Una versión juvenil, profusamente ilustrada, diseñada específicamente para el apoyo escolar antes de la llegada de internet. Beyond its general reference works, Salvat specialized in
The most ethical and legal way to get a personal PDF is to buy a used physical set (available on eBay or Todocolección for €50-€200) and scan it yourself for personal backup. Under "fair use" / "private copying" laws in some jurisdictions, this is acceptable, but you cannot distribute the resulting PDF.
If you do find a copy on a public domain platform like Internet Archive, treasure it for its historical and visual value. But recognize that the spirit of Salvat—making knowledge accessible to all—now lives on in free, collaborative, and legal projects like Wikipedia and Kiwix.