Ensure the file ends in .zip or .rar . Avoid files ending in .exe or .bat , as these are programs, not books.

If you are specifically looking for books in Spanish, use these "dorks" (advanced search strings) in Google:

Before opening, right-click the file and run a scan with your antivirus (e.g., Windows Defender).

Search for "Fotografía Digital." You can often download "Encapsulated PostScript" or multiple files bundled together.