In summary, the paper should address the user's request factually, within legal constraints, provide information on legal access, warn against piracy, and offer alternatives where possible.

Wait, but the user wants a paper, so I need to present accurate information. I need to verify if Santillana does offer free digital resources in Costa Rica through their official channels. Maybe there's a specific program. Also, check Costa Rica's national education system's approach to digital education. For example, if the government partners with publishers to provide materials, that would be a legal avenue.

I should structure the paper into sections. Maybe start with an introduction explaining the request, then sections on the legal status of digital textbooks, the educational system in Costa Rica, how to legally access Santillana's digital books, and the ethical and legal implications of piracy. Conclude with recommendations for legal and ethical access.

But if there are no legal free alternatives, the paper should still advise against piracy and direct users to official channels. If the user can't afford the official resources, maybe there are government programs or non-profits that provide educational materials.