The project The Bohemian Bookshelf is exploring serendipitous book discoveries through information visualization. The visualization is either for libraries or for book stores. The prototype was developed in 2012 by Alice Thudt (University of Munich), Uta Hinrichs and Sheelagh Carpendale (both University of Calgary).
With the help of five interlinked visualizations the user got multiple visual access points into the collection. The visualization uses timelines, a color grid of the book covers, different displays of text (keyword chain, author spiral). The prototype wants to encourage the serendipity as an important factor in information seeking or even research and also wants to trigger the curiosity of the users.
Take a look at the project paper here.