I have been aware of Bayesian Networks for a couple of years but never really got deeply into them. I don't know why - the combination of Bayes and graphics fits right into my spectrum of interests. Nevertheless I am going to make up for lost time and dig into the literature. Being of a practical mind I think the following volume looks intersting volume (based on Google preview and downloading a couple of Chapters) Bayesian Networks: A practical guide to Applications. It has been ordered and is hopefully on the way.