Richard E. Neapolitan's interests include probability and statistics, expert systems, cognitive science, and applications of probabilistic modeling to fields such as medicine, biology, psychology, and finance. Dr. Neapolitan is a prolific author and has published in the most prestigious journals in the broad area of reasoning under uncertainty. He has an international reputation both as a theoretician and a practitioner and has been invited to speak and conduct classes internationally. Books he has written include Probabilistic Reasoning in Expert Systems (1989); Learning Bayesian Networks (2004); Foundations of Algorithms (1996, 1998, 2003, 2010, 2014), which has been translated into three languages; Probabilistic Methods for Financial and Marketing Informatics (2007); Probabilistic Methods for Bioinformatics (2009); and Contemporary Artificial Intelligence (2012). His seminal 1989 text Probabilistic Reasoning in Expert Systems served to establish the field we now call Bayesian networks. His approach to writing science books is innovative; his books have the reputation for making difficult concepts easy to understand while still remaining thought-provoking.