Websites offering a "free direct download link" for a current edition handbook are almost always illegal (pirated content). Risks include:
I should also mention the importance of using official sources to ensure the information is accurate and up-to-date. Pirated copies might be outdated or incomplete, which could be misleading. It's good to highlight the risks of using unverified sources, including potential malware from file-sharing sites. handbook of medical radiography pdf