Abstract
Paper books offer a unique physical feel, which supports the reading experience through enhanced browsing, bookmarking, freeform
annotations, memory and reduced eye strain. In contrast, electronic solutions, such as tablets and e-readers, offer interactive
links, updatable information, easier content sharing, and efficient collaboration. To combine the best aspects of paper and digital
information for reading, we demonstrate two mechanisms for augmenting paper with light sensors that trigger digital links on a
nearby smartphone. Light Tags on every page of a book are used in a first demonstration to identify which pages are open. These
are replaced with an electronic Magic Bookmark in a second demonstration, avoiding the need to instrument every page.