I'm doing a ton of reading lately, both fiction and non-fiction. It's a great escape from the hours I spend online. While there are plenty of comparison shopping sites I prefer the immediacy of comparison happening as I'm looking for information on an author or book. Book Burro extends Firefox by providing price comparisons from most of the popular online book sites while I'm looking up the book on any site. Book Burro remains hidden in the background when not in use, dropping down an unobtrusive list of prices from stores when I'm shopping through titles.