VitalSource Bookshelf® is the most used e-textbook platform in the world today. Portable, interactive, cost-effective. Complete portability means all your books on one little device—online or off. Save the enormous backpack for camping. Better tools make better learners. Bookshelf powers interactive, media-rich content and provides the best search options available. Search text, figures, titles, your notes, or even your friend’s and teacher's notes.