Because of this encryption, that can take a raw VBK file and turn it into a PDF directly. Any website claiming to do this without requiring you to log in to your VitalSource account is likely a scam or malware risk.

Specifically designed for Bookshelf files; supports Windows and Mac. VBK to PDF/EPUB High-quality conversion claiming no watermarks. vitalsource2pdf (GitHub) Textbook Scraper

: Another specialized software that claims to convert VBK files into non-watermarked, high-quality PDFs while maintaining text searchability.