Choosing a book to read

A nifty Web site conveniently called Whichbook gives readers some choices on finding a book to read based on their desires. Different criteria are presented along a continuum. The reader chooses four criteria, places the indicator somewhere along the continuum (for instance, between happy and sad, funny and serious, long and short, expected and unpredictable) based on their feelings and a list of books appears. For instance, you might choose you want a book that is pretty happy but also very violent and unusual. Put in those indices and a list of books appear!