Group items tagged

This blog post does a nice job of providing insight and tips on how to use the "Subtext" app. 

"Subtext is an intriguing iPad application that allows users to read books collaboratively. While reading, participants can insert text, emotions, questions, links and thoughts into the margins of the book. When other readers jump into the text they can see the notations and reply to the existing thoughts in a discussion thread that is neatly tucked away into the margins of the text."