Abstract
We demonstrate a flexible electronic bookmark designed to facilitate the augmentation of printed content with media-rich, dynamic digital content, thereby extending the utility of ordinary books. The system, produced by the hybrid integration of photosensors, detects the currently open page within a book via gestures that are natural to the book reading experience. Physical cut-outs within the page or high contrast patterns printed in graphical ink define a unique code, which is optically read by the functional bookmark.