If you want to decrypt, download the entire book, and print the book as a whole, you need to upgrade Epubor VitalSource Downloader to the paid version. What I’d love to do is convert the DRM-controlled ebook and be able to read it on my kindle, instead of the bloaty VitalSource software. The Official Guide to Convert Vitalsource Bookshelf to PDF and Remove VBK DRM 2. Since the VBK format is a proprietary format. The VitalSource Bookshelf application lets you perform a number of advanced functions with your VBK e-books.